Time: 11:00AM – 3:30PM

Location: Below Gross Reservoir

South Boulder Creek 10/22/2025 Photo Album

What a day! October 22 is kind of late in the season for this fair weather angler, but the high in Denver was projected to climb into the seventies, and when I checked the two locations close to my intended fishing destination, the weather indicated temperatures in the sixties. I decided to pay an autumn visit to South Boulder Creek.

Source of Early Trout

The flows were reduced at 17 CFS, but I knew from previous experience that I fished successfully at 10 CFS. Low clear flows would dictate stealthy approaches, longer casts and light flies. I was prepared.

So Pretty

I arrived at the Walker Ranch Loop Trailhead, and I quickly geared up with my Sage R8 four weight. For clothing I wore a short sleeve high tech undershirt and my fishing shirt, but I loaded my backpack with my raincoat and a long sleeve Under Armour shirt. If I perspired excessively, I planned to change undershirts, before I began to fish.

Another Early Rainbow Trout

There were three cars in the parking lot besides my Telluride, but none of them were obviously fishermen. In fact, I never saw another angler during my entire time on the creek, nor did I encounter any on my hike to and from the stream. I had the entire small tailwater to myself. Perhaps the low flows scared away other anglers.

Shelf Pool

As I descended the trail to the creek, I heard the sound of heavy equipment operating to the west. Almost instantly I went into panic mode, as I envisioned the 17 CFS as a muddy mess from excavation taking place at the dam expansion site. You can imagine my relief, when I caught my first glimpse of the creek, and it was crystal clear.

Stealth Required

When I finally arrived at my chosen starting point, I concluded that I was perspired but not to the degree that I required a shirt change. I began my quest for South Boulder Creek trout with a solo peacock size 14 hippie stomper, and the dependable fly yielded three fish including a nice eleven inch brown.

Fine Rainbow Trout

After the early success, the trout’s interest in the stomper seemed to change into observation, and refusals ruled the day. I paused at 11:45PM to enjoy my lunch, and then afterward I replaced the hippie stomper with a size 14 olive deer hair caddis. The caddis produced a few fish to boost the fish count to seven, but it was very difficult to track in the glare and shadows, and it also elicited some refusals.

Next to the Exposed Boulder Was a Target

My mind went into overdrive, and I considered the idea of a beetle. Hatches are rare late in the season, but the 2025 autumn has been unusually mild thus enabling the survival of terrestrials. I knotted a size 14 Jake’s gulp beetle to my line, and I added a sunk ant on an eighteen inch dropper. Large black ants are quite prevalent in the South Boulder Creek canyon.

Very Nice Brown for a Small Stream

The move paid handsome dividends, and I built the fish count to eighteen, before I once again stalled. Five of the eaters during this span of time gobbled the sunk ant, but the rest sipped in the beetle. In addition I experienced many temporary hook ups, where the trout nipped the beetle, and I set and connected, but the fish wriggled free in a short amount of time. Beetle takes are very subtle probably because the small foam fly rides low in the water, and the fish dart to the surface and execute a quick sip.

Another Brown Trout Run

When I got stuck at eighteen, I began to notice an increased number of airborne insects over the water. The naturals included small caddis, a couple mayflies and a stonefly. This observation prompted me to swap the sunk ant for a size 16 gray deer hair caddis. The beetle and caddis combination raised the fish count from eighteen to twenty-four; its final resting place before I quit and completed the exit hike.

Large Tail

Twenty-four trout landed on a fall day in October is very satisfactory, but of course, many of the fish were small and in the six to nine inch length slot. However, I also landed a fat thirteen inch rainbow and two fourteen inch brown trout that challenge for the largest browns that I ever landed in South Boulder Creek. The second brown smacked the caddis near the end of the day.

As predicted, the weather was gorgeous. I had the stream completely to myself and the beetle was a solid attractor. I took advantage of one of the remaining nice days of 2025, and I am pleased with the results.

Fish Landed: 24

Time: 10:30AM – 3:00PM

Location: Below Gross Reservoir

South Boulder Creek 08/27/2025 Photo Album

I was a bit under the weather on Tuesday after over exerting and not drinking enough fluids on Monday, but I made plans to fish South Boulder Creek with my young friend, Nate. It had been quite a while since Nate and I fished together, since his job and pursuit of a career dictated higher level priorities. However, with a short break in his education, we managed to meet up on Wednesday, August 27, 2025.

Because of my concern over my weakened condition from illness, I parked at the kayak lot, as this allowed a shorter albeit steep return hike at the end of the day. The sky was overcast, and the temperature was in the mid-sixties, as Nate and I prepared to fish. I selected my Loomis two piece five weight for my day on the creek. Flows were steady at 100 CFS.

Lunch View

We were positioned along the creek by 10:30AM ready to cast. I began with a solo parachute drake with the hope that the trout had a long memory for western green drakes. In the first decent pool I witnessed five refusals to the parachute green drake. Needless to say, I was very disappointed. I tested it in a few more promising spots, but fairly quickly I converted to a dry/dropper featuring a size 8 tan pool toy hopper, a prince nymph, and a salvation nymph. I never really got a read on this combination, as all three flies separated from my line for some unknown reason, probably a bad knot connecting to the eye of the hopper.

Amazing Color

When I rigged anew, I switched to a peacock hippie stomper and an olive perdigon. Nate was having quite a bit of success with his dry/dropper, and one of his nymphs was a perdigon similar to a rainbow warrior. I managed to land two small brown trout on the perdigon, but then I suffered through a lengthy time period with no action in spite of some very attractive creek structure. I finally ended the late morning frustration by wading to the bank to find a decent resting spot to eat my lunch.

Cannot Wait

Since Nate was faring quite well after lunch with his dry/dropper, I reverted to that approach. I knotted another tan pool toy hopper to my line and then followed it with an ultra zug bug and a size 18 pheasant tail nymph. The pool toy hopper suddenly worked some magic, and I landed two decent rainbow trout in the eleven to twelve in range on the foam terrestrial. Next, a fish grabbed the pheasant tail, and suddenly I was in the realm of respectability at five fish landed. Another trout grabbed the ultra zug bug, and then Nate and I spotted some natural green drakes floating above the creek.

Sleek Look

Nate quickly switched to a green drake, and he immediately netted a couple fish. This was the impetus I needed to make the same change, and I placed a size 14 parachute green drake on my line. For the remainder of my time on South Boulder Creek I fished green drake patterns including the paradrake, a user-friendly geen drake, and a comparadun green drake. The fish count climbed from six to eleven, and most of the takes were instigated by the parachute green drake.

Hit the Pocket

Although I enjoyed the two hours of green drake prospecting, the episode was nothing like my experience on my two previous visits to South Boulder Creek during the green drake hatch. The fish were very discerning, and I probably had one refusal and one temporary hook up for every fish that I landed. I rotated among the green drake styles, but none of them delivered the consistency that matched my earlier trips.

Backhand Casting Wizard

The highlight of the day occurred around 2:30PM. I was presenting a double dry with the user friendly in the forward position and the parachute green drake trailing. I made a reach cast across some currents and created a long drift over a relatively smooth slide of moderate depth, and suddenly I spotted a take just as the flies were set to drag before the lip of the run. I swiftly set the hook and immediately saw the side of a substantial brown trout flash. Eventually after a spirited battle, I slid my net beneath a fifteen inch brown; a giant by South Boulder Creek standards. Needless to say, this made my day.

Last and Best Fish

We both quit at 3:00PM, when we reached a narrow streambed that created fast whitewater. We were tired and not up for continuing, so we hooked our flies to our rod guides and made the return hike. Although Wednesday did not measure up to earlier South Boulder Creek green drake outings, it was a success nonetheless, and I valued my time with Nate. Nate’s fly fishing abilities have advanced measurably, and he accumulated fourteen fish on the day. I, in turn, landed eleven. All our fish were hard earned, and two double digit fish counts were worth a gorgeous day on South Boulder Creek.

Fish Landed: 11

Time: 10:30AM – 2:30PM

Location: Below Gross Reservoir

South Boulder Creek 08/12/2025 Photo Album

I recently spoke to my son and suggested that we should plan a day of fishing on South Boulder Creek, now that the flows were reduced to 104 CFS, and the trout were tuned into western green drakes. He checked his work schedule, and we agreed to follow through on a day of fly fishing on Tuesday, August 12, 2025. Dan lives in Louisville, CO and has two young boys, so the opportunity to fish with him is infrequent and highly valued by this dad.

Dramatic Colors

I met Dan at his home in Louisville, since it is on the route to the Walker Ranch Loop Trailhead. I switched my gear to his car, and he drove the winding and steep road through Flagstaff Mountain Park to the parking lot at the trailhead. The high temperature in Denver was forecast to hit the upper nineties, so we knew it was going to be a hot one, but I was reluctant to wet wade, as the cold flows from the bottom release dam make me feet cold, even when I wear thick socks and waders. We both wore our waders and suffered, especially on the one mile hike up the hill at the end of our day. I chose my Loomis two piece five weight, because it is less than nine feet and offers a slower action for casting dry flies.

Very Productive Pool

By 10:30PM we were perched next to the creek. Dan commanded the left side of the stream, and I advanced along the right bank. We both began with parachute green drakes, and we were not disappointed. We experienced some refusals, but for the most part the trout were where one would expect them to be, and they liked our green drake imitations.

Dan Focused

By noon we met on my side of the creek, and my fish count rested on ten, while Dan accumulated seven. After I devoured my peanut butter and jelly sandwich and a few other snacks, we resumed our progression. As is usually the case with green drakes, the fish became more selective after lunch, and refusals and looks became problematic. Dan switched to a user friendly, after I gave him one at lunch time, and he began enjoying some success.

Pretty Brown Trout

I, on the other hand, did not fare as well with the user friendly, so I progressed to a size 14 green drake comparadun. This fly enabled me to boost the fish count by five, but the olive and brown low riding fly was very difficult to track, especially in shadows and glare. Dan persisted with the user friendly with decent success, so I reverted to that fly. I observed three natural green drakes during the 1:00PM to 2:00PM time frame.

Chunky

The final switch to the user friendly proved somewhat successful, and I moved the fish count to twenty-one by the time we quit at 2:30PM. The foam green drake imitation was not perfect, as I experienced quite a few looks and refusals. The easy pickings of my previous trip to South Boulder Creek were clearly a thing of the past. Dan, however, continued to progress upstream along the south bank with quite a bit of success, and he ended his day with a fish count in the same ballpark as my twenty-one. Forty plus fish in 3.5 hours of fishing was certainly a fine day.

Long Pocket

At 2:30PM we began our return hike, and I endured the one mile unending climb to the parking lot with at least five rest stops and water breaks along the way. What a fun day! We both commented on the feeling of remoteness, even though we were only a half hour away from Boulder, CO. When we first arrived, Dan pointed out an eagle, as it glided across the creek below us. On the drive back we encountered a wild turkey, as it shuffled across Flagstaff Road. Standing in the cold creek on a hot day was very pleasant, even though we wore waders. The trout were hungry for green drakes, and we eagerly met their needs. Hopefully I can record a few more green drake outings during 2025. Spending a day with my son was a rare opportunity and highly treasured. That companionship was more valued than any of the trout landed on Monday.

Fish Landed: 21

Time: 10:00AM – 3:00PM

Location: Below Gross Reservoir

South Boulder Creek 08/04/2025 Photo Album

I always keep my eye on the DWR graphs for South Boulder Creek below Gross Reservoir, and I noted that the flows dropped to the 144 CFS range over the most recent seven days. This could only mean one thing; game on for fly fishing SBC. I reviewed my posts for South Boulder Creek for late July and early August, and I learned that I hit green drakes on August 3, 2022. Could 2025 also be an early western green drake year? Read on.

Spectacular Colors

By the time I made the drive, assembled my Loomis five weight and hiked to my chosen fly fishing spot it was 10:00AM. The temperature in the parking lot was 69 degrees, but the high in Eldorado Springs, the closest town, was projected to hit the upper 90’s. I knew it was going to be a hot one. Needless to say, by the time I was ready to fish, I was a bit damp. The flows were, in fact, 144 CFS, and the creek was clear. These flows were higher than I prefer, as they limited my mobility, but the presence of green drakes offset flow shortcomings.

Bankside Pool Was Productive

I began my day with a size 14 parachute green drake. This has become my favorite western green drake pattern, although I carry five different types. As it turned out, all the trout I landed on Monday grabbed a green drake pattern. I did have to test different patterns, however, throughout the day, when one fell out of favor.

Nice Small Stream Brown Trout

Between my start and 11:45AM, the parachute green drake fooled twenty trout. Yes, the fishing was torrid. In nearly every location that looked like it might hold fish, a trout emerged to crush the green drake. It was not always the first cast, but quite often that was the case. I quickly discovered that the fish avoided the pockets and slicks in the middle of the river, so I confined my casts to the likely holding lies along the banks. There were a few places, where I was able to maneuver enough to launch some casts to the opposite bank, but for the most part this gambit was not effective. Upstream casts along the right bank were the most productive. In addition, some places were wide, and this allowed the creek to spread-out and create moderate riffles and pockets, and I was able to wade to the middle to cover all the likely spots.

Parachute Green Drake Was Popular

I continued with the parachute green drake after lunch for fifteen minutes, but suddenly the trout consistently refused the previously hot fly.  This was a common occurrence during previous year outings, and my reaction was typically to switch to a green drake comparadun. I followed tradition, and the comparadun delivered and moved the fish count from twenty-five to thirty-one. However, the low riding fly with a large high wing was also refused, and it was very difficult to track because of its earthy colors.

Slender Look

I grew frustrated with the low visibility and the inability to follow, so I made another exchange. In this instance I substituted a user friendly green drake. This fly was designed by Andrew Grillos, and it is very similar to a hippie stomper. It possesses a different wing, and I modified it to display the green drake colors. I have had some previous success with the user friendly, but I consider it a third option behind the paradrake and comparadun. Well, guess what? It became a hot fly. I improved the fish count from thirty-one to sixty-two on the back of a user friendly. I tested it, because I suspected that the fish were looking for a wider and bushier profile, and the user friendly possesses those qualities. In addition, the foam strip makes the fly very buoyant, and the white wing enhances visibility. It worked better than I ever expected.

Wide Bank Pool to Explore

By 3:00PM I was weary, and I reached a point where significant rock scrambling was required to continue an upstream progression. I faced a one mile ascent to the parking lot, and I was depleting my energy supplies. I called it quits and hiked back to the car.

Face Down

What a day! Of course, many of the trout landed fell in the six to eight inch range. Nevertheless, there were enough brown trout and rainbow trout in the ten to twelve inch slot to keep me focused. I love prospecting with a single dry with the knowledge that the fish were tuned in, and I could expect a response in nearly all promising spots. In fact, quite a few marginal locations also generated takes. The rainbows were on average a bit larger than the browns, although I never landed a fish from either species longer than a foot.

User Friendly Green Drake

Hopefully I can return in the near future when the green drake hatch intensifies. I saw one natural green drake during my entire stay on the creek, but the trout were certainly aware of their presence. A modest drop in flows that offered better wading conditions would also be welcome. Stay tuned.

Fish Landed: 62

Time: 11:15AM – 3:00PM

Location: Below Gross Reservoir

South Boulder Creek 05/04/2025 Photo Album

I normally avoid fly fishing on weekends, but on Sunday, May 4, 2025 I made an exception. The weather forecast for Monday through Wednesday of the upcoming week portended adverse fishing conditions, so I made the trip to South Boulder Creek. I kept my eye on the flows below Gross Reservoir, and they remained steady at 45 CFS for more than a week. These flows are a bit low for my preference; however, I have enjoyed success at even lower levels. The high temperature in the canyon was forecast to reach the mid-sixties, so that also played into my decision.

By the time I made the relatively short drive and jumped into my gear and hiked to the creek, my watch displayed 11:15AM. My trip through Flagstaff Mountain Park was slowed by a caravan of cyclists climbing the steep and winding road. Kudos to all the riders who finished the ascent.

Covered in Spots

The parking lot at the Walker Ranch Loop Trailhead was nearly full, but I lucked out and found a recently vacated slot. I wore my fleece hoodie, but I avoided my long sleeve undershirt and stuffed my raincoat in my backpack. The temperature at the parking lot was 61 degrees. I have been using Pinecliffe, CO in Weather Underground as my proxy for weather at South Boulder Creek, but I concluded that the higher elevation mountain village probably understates the air temperatures in South Boulder Creek below Gross Reservoir.

Narrow Ribbon of Fishable Water

To begin my quest for trout I began with a peacock size 14 hippie stomper and then added an olive perdigon on a three foot dropper. Beneath the perdigon I knotted a size 20 salad spinner midge pupa imitation, and I began to probe the likely fish holding lies. In a short amount of time I landed a small brown trout barely longer than my six inch minimum, and it grabbed the perdigon.

Stripe Separate from Cheek

As I began my move to the next attractive spot, I noticed two anglers not more than thirty yards above me. I did not pass another fisherman during my entire inbound hike, yet two competitors showed up within a stones throw of my position! Needless to say I was disappointed, so I stripped in my line and secured it and circled around the invaders of my sacred space.

A Brown Joins the Fun

I hiked .25 mile to give them space, and then I angled back to the creek in a place where I enjoyed decent success in the past. I once again began to probe the pockets, runs and riffles; and I added three rainbows to bring my fish count to four by lunch time a bit before noon. During this time I abandoned the salad spinner and replaced it with a beadhead hares ear nymph and a bright green caddis pupa, but all the action came on the olive perdigon and hippie stomper.  I quickly munched my sandwich and carrots, and then I resumed my prospecting, but guess who I spotted thirty yards above me? It was my nemeses. I saw one of them look back, and they spotted me, so they quickly moved out of sight. I made a mental note of where they were first noticed, and then I fished to that spot and pondered my next move.

Nice Bankside Run

I suspected that they exited and left the next stretch undisturbed, but I could not be sure, so I once again cut over to the trail and worked my way up the path. I found them just downstream of my favorite pool, so I stealthily bypassed them and hoofed quite a distance before re-entering the creek. I estimate that I hiked at least half a mile to allow them space.

As I recall, the fish count was now at six, and during the remaining time on the water, I elevated it to seventeen. The hares ear and caddis pupa failed to generate any action, so I replaced them with a sparkle wing RS2, and I kept the hippie stomper, perdigon, RS2 combination in place for quite a while.

Scene of Rising Fish

At 2PM I approached a gorgeous long pool with a deep run flowing down the center. Just before arriving, I experienced quite a few refusals to the hippie stomper, so I decided to remove the nymphs and transition to a double dry with the hippie stomper and a size 16 olive-brown body deer hair caddis. The caddis fooled one fish, before it created some refusals, and I began to spot a few random rises. My hunch told me that blue wing olives were emerging, so I replaced the caddis with a CDC blue wing olive.

Brilliant

I persisted with the double dry for the next hour, and I added four more trout to bring the total to seventeen. For some reason the stream residents began to smack the hippie stomper, when it was combined with the tiny CDC BWO.

The Workhorse Fly on Sunday

By 3PM I once again bumped up against a trio of anglers, so I decided to call it a day, and I completed the arduous one mile steep ascent from the creek back to the parking lot. The weather was perfect, and I landed seventeen fish, so I cannot complain. Nevertheless, the size of the trout was lacking, with the largest perhaps in the eleven inch range. Oddly the ratio favored rainbows with probably seventy percent of the pink striped variety. The rainbows more than made up for their lack of size; however, with their brilliant colors and spot patterns. I must admit that the competing anglers were a pain, and I missed my normal solitude enjoyed during weekday stream visits.

Fish Landed: 17

Time: 11:00AM – 3:45PM

Location: Below Gross Reservoir

South Boulder Creek 10/22/2024 Photo Album

After a tough weekend battling a cold relapse, I found some solace in the fact that the weather wasn’t all that inviting for fishing either—cold and wet. But by the time Monday rolled around, unseasonably warm weather made its way into Colorado, presenting an opportunity I couldn’t pass up. With the sun shining again, I set out for a much-needed day on the water.

Typical Pocket in the Morning

Another Great Spot in the Morning

The first stream that I reviewed was South Boulder Creek below Gross Reservoir, and I was relieved to see flows at 82 CFS—a much-needed improvement after weeks of meager trickles around 6.7 CFS. However, a scare came early Tuesday morning, when I noticed a spike to 97 CFS. Thankfully, by the time I checked again, flows had returned to 82 CFS, holding steady as I prepared to head out. Oddly enough, when I returned home later that day, I found the flows had dropped to 65 CFS, while I was on the creek, which is nearly perfect for me. It turned out to be an ideal day to hit the water.

Right Area Next to the Bank Was Typical of Very Productive Water

Stunning Colors

I arrived at the trailhead around 10:00 AM, greeted by a brisk 56-degree temperature and a stiff breeze. For the hike in, I wore my usual fishing shirt layered over a short-sleeve undershirt, but packed an extra long-sleeve Under Armour layer just in case. The air was cool, but comfortable enough that I never felt the need for a clothing change. By 11:00 AM, I reached my starting point along the creek and rigged up with my favorite fall setup: a peacock Hippie Stomper trailing an ultra zug bug and salvation nymph.

Wide Productive Section

Feisty Rainbow

The morning session proved to be steady, although the wind and the shade made things feel colder than expected. The combination of light sweat and the breeze led me to put on my raincoat for some added warmth. Despite the chilly start, I landed four fish by the time I broke for lunch at noon—three small browns and one small rainbow trout. Although none of the fish were large, they were a good start to what would become a fruitful day.

After lunch, the fishing picked up. I continued upstream, sticking with the dry/dropper setup that had brought success earlier. By mid-afternoon, the fish count rose to sixteen. The catch was evenly distributed: eight fish smashed the Hippie Stomper, while the ultra zug bug and salvation nymph each accounted for four fish. Interestingly, the ultra zug bug started strong but seemed to lose effectiveness as the day wore on, with the salvation nymph picking up the slack.

Long by Tuesday Standards

Center Slick Looks Prime

Upon reaching sixteen, I decided to change tactics and switched to a double dry fly setup. I kept the Hippie Stomper as the lead, but added a size 14 light gray deer hair caddis on a twelve-inch dropper. The move paid off. The afternoon saw another seven fish come to hand, with half falling for the Stomper and the others grabbing the caddis. Toward the end of the day, I swapped out the size 14 caddis for a size 18, which proved just as effective.

Another Nice Spot Along the Bank

Throughout the day, I noticed an abundance of refusals on the Hippie Stomper—enough to prompt the shift to a double dry setup. Despite the occasional refusals, the overall catch rate using double dries remained steady, and I was pleased with the action.

Near the End of the Day Jewel

Most of the trout landed were on the smaller side, with the largest coming in around eleven inches. Brown trout outnumbered rainbow trout by a two-to-one margin, and the most productive water tended to be the tails of long pockets, riffles, and slower-moving pools near the bank. I was surprised several times by fish emerging from shallow lies, where I wouldn’t have expected to find them.

Probed Both Sides of the Pyramid Rock on Right

All told, I landed twenty-three trout—admittedly small, but each a vibrant testament to the beauty of fall fishing in the foothills of the Rockies. More than half of the trout came to the surface on dry flies, and dry fly action in late October is always a welcome treat. The relatively smaller size of the browns might be a result of their spawning activity, although I didn’t observe any active spawners. With cooler weather on the horizon, future outings will depend on Mother Nature, but I’ll be keeping my gear ready for the next window of opportunity.

Stay tuned for more fishing adventures as 2024 unfolds!

Fish Landed: 23

Time: 11:00AM – 4:00PM

Location: Below Gross Reservoir

South Boulder Creek 08/28/2024 Photo Album

With Labor Day weekend and a trip to Hilton Head Island in my near future, I was facing perhaps my last fly fishing outing until the second week of September. I checked the flows on my home waters, South Boulder Creek, and the water managers cranked down the valve to 100 CFS. It was 122 CFS during my last visit to the tailwater below Gross Reservoir, and that level dictated extreme caution when wading with only a few viable crossing points. The combination of lower flows and the prospect of the presence of green drakes clinched my decision. I made the trip to the Walker Ranch Loop trailhead for a day of fly fishing.

The temperature at the parking lot, when I arrived, was 74 degrees, and I suspect that the reading reached eighty degrees, by the time I hiked out of the canyon at 4PM. I chose my Loomis two piece five weight for my casting tool. Somehow I strained my neck while camping over the weekend, and I felt like the short rod would provide less strain to the neck area, when I lifted the line to make a cast. Also, I planned to toss a double dry fly, and the slow action Loomis is well suited to that task.

Corner Pocket Was Productive

By the time I hiked down the trail to my chosen fishing spot, it was 11:00AM. I selected a peacock hippie stomper from my MFC fly box, and then I added a parachute green drake on a twelve inch dropper. It was slow going initially, as I prospected some very attractive pools and pockets with nary a look, but I persisted with the double dries, and eventually I was rewarded for my patience. In the 1.5 hours before lunch, I landed ten trout, and this included a couple very respectable brown trout and rainbow trout. Initially my best results came from pockets and runs along the edge of the creek, but as time passed, the fish in the larger and more obvious locations began to respond as well.

Plump Rainbow

Early Brown Trout

There was very little strategy on Wednesday, August 28. I fished the double dry consisting of the stomper and paradrake for the entire time, until I stopped at my favorite pool, but more on that later. The parachute green drake was the more productive of the two flies, and I estimate that the catch ratio was 70% paradrake and 30% hippie stomper. The desirable pair of flies in the eyes of the trout accounted for forty fish on the afternoon. The flies were not perfect, as an abundant quantity of refusals and rejecting looks were a significant part of the story.

Photographed Purely for the Color

Along the Rock

Between 12:30PM and 2:30PM, however, the fish were definitely tuned into the green drake. I spotted a handful between 1PM and 2PM, but they were not available to trout in great abundance, I attributed much of my success to trout having long memories for western green drakes.

Long for These Waters

What sort of water was the most productive? Deep slots and potholes around exposed boulders produced some surprisingly nice fish. Also, the lip of pockets and runs, where the water began to accelerate and sluice over the lip was another favorite. On several occasions I gave up on the drift and made a lift just prior to the fly racing over the lip, and I found myself attached to a fish. This always amazes me.

Ooh La La Pool

Brown Trout Perfection

By 3:30PM I decided to call it a day, however, on my return hike I could not resist the temptation to make a few casts to my favorite pool. Upon my arrival I lobbed ten casts with the double dry, but these selective fish were having none of it. While I observed, a flurry of rises commenced, but their target was so small that I was unable to determine the preferred food item. I began to cycle through fly changes, and I replaced the parachute green drake with a size 18 deer hair caddis. It became apparent that caddis was not the answer. Next I knotted a Jake’s gulp beetle as the trailing fly, and it was equally ignored. Finally in frustration I stretched my net seine across the mouth, and I held it in the current for three minutes. When I examined the contents of the seine, I noticed some nymph casings and a crippled mayfly with a dark olive body. I concluded that the fish were responding to a blue wing olive hatch, and judging from their aggressive feeding, I guessed emergers. I replaced the beetle with a soft hackle emerger, and I dabbed the body with floatant to fish in the surface film. This generated a couple looks, but no action. Next I replaced the soft hackle emerger with a CDC blue wing olive, and once again the fish ate naturals in close proximity to my fly. I finally threw in the towel and moved on.

Tucked Under Branches

The prevalent size of trout on the day was eight to nine inches, but I was pleased to land five trout in the twelve to thirteen inch range. Two browns and one rainbow stretched to the upper limit of the size range. The weather was ideal, and the flows were reduced more to my liking, and green drakes were favored by the wild trout. I could not have asked for a more enjoyable fly fishing outing.

Fish Landed: 40

Time: 11:00AM – 3:00PM

Location: Between East Portal and Rollinsville

South Boulder Creek 08/26/2024 Photo Album

Jane and I reserved a campsite at Kelly Dahl campground from Sunday, August 25 through Tuesday August 27. We invited a group of friends to join us, and six agreed to camp along with three who planned to make a day trip on Monday, August 26. Two of the six who committed to overnight camping had to withdraw due to a family medical issue, so four of us arrived on Sunday and set up camp at sites 23 and 24. We scrambled to assemble the canopy and tents, before rain commenced on Sunday, and we were all thankful for the canopy cover that made dinner and evening card games comfortable.

Canopy Ready for Rain

Most of the group planned to complete a hike at the East Portal on Monday, but I tossed out the idea of fly fishing. Our friends, Howie and Sandie, decided to accompany me on the fly fishing venture. The only decent option within close driving distance of Kelly Dahl was South Boulder Creek between the East Portal and Rollinsville. I fished this section of South Boulder Creek a few years ago, so I decided to give it another trial. I had low expectations, but I hoped that Sandie and Howie could experience catching a few wild trout from the small stream.

We arrived at an obvious public stretch of the rapidly flowing creek by 10:30AM, and we were positioned on the stream casting by 11:00AM. Howie and Sandie decided to share a rod and alternate, and they were prepared before me, so they cut down to the creek first. Howie began with a Charlie Boy hopper and a beadhead pheasant tail nymph.

For the start of my day I bet on a tan size 8 pool toy hopper and a salvation nymph. I ambled along the creek for fifteen yards, before I slid down the bank and crossed the creek.   I began working up along the opposite bank, and I managed a small eight inch brown trout in the early going along with a couple browns below the six inch cut off that I require in order to count.

Fast Water Ruled

After the early success, I endured a fairly lengthy dry spell with quite a few refusals to the pool toy hopper. The nymph was totally ignored, so I added a 20 incher below the salvation to generate deeper drifts. The creek was tumbling along quite rapidly due to high gradient and flows that I suspect were above average for the last two weeks of August. My deep nymph strategy was rejected completely by the resident fish, so I crossed back to the road side of the creek,

I decided to look for Howie and Sandie to suggest that they try a different approach, but they were not in sight. I walked down a nice path that followed the top of the bank in an eastward direction, and eventually I found them. I rounded them up, and we moved back upstream beyond the parking lot that contained many worn paths and that screamed heavy fishing pressure. For the remainder of the afternoon we progressed upstream along the left bank and alternated among the three of us. I switched to a peacock hippie stomper and a size 14 light gray caddis, while Sandie and Howie utilized a Chernobyl ant and a size 16 parachute Adams.

During this time frame Howie had a slap at the trailing Adams, but he never saw it. On one other occasion, however, he spotted the take and set the hook and momentarily felt the weight of a brown trout. Unfortunately it quickly popped free and swam to freedom.

Best Fish of the Day

During my turns I tended to claim the places that looked fishy, but required superior casting skills. This entailed quite a few casts across the main center current to slower moving shelf pools. I executed mends and reach casts to counter the drag of the main current on my fly line. In a few cases my mend caused the double flies to skip or jump, and the fish responded with a refusal or look.

Same Fish Extended

I did manage to hook and land three browns during my turns. All of these trout consumed the deer hair caddis, and they were all in the eight to ten inch range. By 2:30PM some dark rain clouds slid across the sky and settled above us. I was wearing my raincoat for warmth, and it was a fortunate choice, as we paused for ten minutes under a cluster of large evergreen trees, as the skies opened with a curtain of rain. After the precipitation ended, we resumed for a short while, but I could sense that the troops were ready to head back to the campground for an early start to happy hour.

We called it quits, but left our waders on, as we drove another five miles to the East Portal. Another angler stopped to chat with us, as we fished along the creek, and he informed us that he fished near the East Portal with decent success on dry flies. One of the spots he mentioned was by some large rock piles. We found the rock piles before arriving at the East Portal parking lot, so I parked and crossed two sets of railroad tracks to have a look at the creek. It was interesting and perhaps worth a future try. The gradient appeared to be a bit less steep, but there was more tight vegetation along the banks to thwart efforts to move upstream.

My fish count was below average, but that was attributable to sharing the stream with Howie and Sandie. My expectations were low, but the high gradient limited the number of fish holding lies, and it represented quite challenging conditions for two fairly novice fly anglers. The combination of high gradient topography and small fish make South Boulder Creek in this area a marginal destination choice in my opinion.

Fish Landed: 5

Time: 10:30AM – 3:30PM

Location: Below Gross Reservoir

South Boulder Creek 08/23/2024 Photo Album

After three straight days of fly fishing early in the week, I took a break on Wednesday and Thursday, but by Friday I was eager to resume my August blitz. My trip on 08/16/2024 to South Boulder Creek was quite successful, and I was very anxious for a return visit. I was fairly certain the green drakes were still active, and I attempt to take full advantage of this once a year occurrence. The continuing heat wave in Colorado was another reason to seek out the cold water releases from Gross Reservoir.

Five or six cars preceded me to the Walker Ranch Loop trailhead, and I prepared for a day on the creek with my Loomis two piece five weight. Slow action, short length, and fast assemblage played into my choice. The temperature was 66 degrees, as I began my hike down the Walker Ranch Loop trail. On my way to my chosen starting point I passed a pair of anglers “practicing” in a spot, where I needed to wade in order to make farther progress. I excused myself, and we exchanged intentions, and they informed me that they planned to move downstream as well.

Early Success

By 10:30AM I arrived at my planned starting point, and I configured my line with a parachute green drake size 14. During my previous visit, I landed all my fish on this style of green drake, and I was hoping for a repeat engagement. Within the first five minutes I landed a small seven inch brown trout that rose and sipped the paradrake in a narrow band of slow moving water directly above my casting position. This event instilled a bit of optimism in my outlook, but then the trout decided to teach me a lesson, as they ignored my casts for a short period. I was spoiled from my earlier trip, and I quickly lost patience, so I modified my approach and added an olive ice dub body hippie stomper as the forward fly followed by the parachute drake.

Small Hidden Pool Produced

The stomper/paradrake combination initiated a frustrating run of refusals and very brief hookups. I counted five in a row. Among them was a fish that slipped free, and the pent up energy in the rod whipped the flies into a tree limb high above me. One can imagine my anger. I flicked the rod away from the flies, and this impulsive but dangerous action, resulted in snapping off two flies. I paused to replace them, but when I was done, I thought I spotted the white wing of the hippie stomper in a dead branch. I moved to the base of the cluster of tree limbs, and I was able to bend the branch down to retrieve my flies. There was, however, a slight problem. The white wing was, in fact, a small dense cobweb! I felt pretty ridiculous, but I gazed back at the next limb that was higher up, and I surmised that I might be able to bend that one down to a recoverable level as well. I did so, and what do you think I found? No, not another cobweb, but the two connected flies. I stuffed them back in their proper resting places in my fly boxes.

Delicate Wildflowers

By noon the fish count rested on a meager total of four, and I was beginning to question my decision to fly fish on South Boulder Creek. The two anglers that I encountered on my hike in appeared, and they proceeded to move below me, but by noon they were within sight. I decided to forsake the section that occupied my morning and move upstream, but when I advanced forty yards, I spotted another young fisherman working on his line in another spot that I needed to wade through. Once again I excused myself and quietly passed by. In retrospect the morning section of the creek was narrow, and the 122 CFS flows created only a few truly promising lies for trout.

Just a Nice Brown Trout

I moved above the angler that I just passed and found a place, where I could battle through some dense branches to regain access to the creek a fair distance above the other fisherman. In this area the stream spread out more, and this offered more side channels and pockets of moderate current velocity and moderate depth. These were the characteristics that attract trout. I progressed upstream through this section from noon until 2:30PM, and I moved the fish count from four to twenty-four. Yes, the catch rate improved dramatically. The hippie stomper and parachute hopper remained in place during the early going, and the flies delivered positive results, but refusals and tentative bites resulting in quick long distance releases plagued my fly fishing outlook. I decided to rotate through other green drakes styles. First I tested a Harrop hair wing green drake, and it provided a fish or two, before it broke off, as I played and released a rainbow trout that crushed the leading stomper. The hair wing was not doing much, so I opted for a size 14 green drake comparadun with a large fan hairwing.

Center Stream Pocket

The stomper/comparadun combination remained on my line until 2:30PM, and the comparadun accounted for roughly 60% of the landed fish with the hippie stomper delivering the remainder. By 2:30PM the sky darkened, and I heard distant rumbling, so I retreated to the shoreline and pulled on my rain shell. I completed this move in the nick of time, as the spigot got turned on, and drenching showers ruled the canyon environment. I backed into a small space beneath a dense evergreen and waited for the curtain of rain to end. A couple times the rain paused, and I stepped back to the creek only to be scared back to my sheltered enclave by thunder and lightning. Finally the western sky got brighter, and I spotted a glimmer of blue, but dense gray clouds predominated above. It was at this time that I observed two flashes with almost instantaneous loud rumbling, and this suggested that the lightning was in close proximity. I snugged back against a rock wall and impatiently awaited the end of the lightning and thunder.

One of Several Nice Rainbow Trout

Finally the thunder became distant, and blue sky ruled above me, so I resumed fly fishing. The temperature plunged during the storm, and I was quite pleased to have my raincoat for additional warmth. I was relatively close to two very attractive pools, so I progressed directly to them. At the first one I executed some long casts across the main current to the shelf pool along the far bank. and a brown trout dashed to the surface and grabbed the comparadun. At the next pool I could see fish finning at the tail and in the right side pool. For the most part they were immune to my efforts to hook them, but one overly aggressive brown snatched the hippie stomper.

The Ribbon of Water Along the Rocks Was Targeted

As I looked on, quite a few fish began to slash the surface, but the object of their actions must have been small, because I was unable to determine the food source. I cycled through the usual suspects which included a CDC blue wing olive, a size 16 light gray comparadun, a size 16 cinnamon comparadun, and a size 18 parachute black fur ant. Finally the ant duped a brown trout to bring my total to twenty-seven. I seined the water with my net seine, but all I could collect were some empty nymph husks. I tried a Craven PMD emerger pattern, but that was not the answer. In a last ditch effort to match the hatch, I removed the double dries and tested a size 20 CDC blue wing olive with a fairly large and fluffy wing. Nothing. As this hatch matching escapade evolved the water became quite tinged with sediment, but the trout seemed to ignore the turbidity, as they continued to feed.

I surrendered to the pool and thanked South Boulder Creek for a twenty-seven fish day and completed the hike back to the parking lot. As I strolled along the trail, the sun reappeared and warmed the atmosphere and this weary angler, and the clarity of the creek improved dramatically. Apparently the slug of run off moved fairly quickly through the narrow canyon. My goal of meeting the green drake hatch was achieved, although the fly fishing was not the free and easy experience of August 16. Friday was a great example of why I carry five different western green drake patterns. The quality of the fish was decent, as I landed a couple thirteen inch rainbows and several healthy twelve inch brown trout. The fish of South Boulder Creek are all wild, and they show off their vivid colors and patterns quite well. Will I register another South Boulder Creek green drake day? it is getting late, but stay tuned.

Fish Landed: 27