Time: 11:00AM – 3:30PM
Location: Below Gross Reservoir
South Boulder Creek 04/07/2026 Photo Album
Not all outings can be as rewarding as those that I experienced early in the 2026 season. Tuesday qualifies as a disappointment in my book. Flows on South Boulder Creek were held steady at 90 CFS, and I knew from previous visits that flows at that level were very conducive to fly fishing. The high temperature in Eldorado Springs was expected to reach 61 degrees, so I decided to make the trip.
I arrived at the Walker Ranch Trailhead parking lot and quickly prepared to fish. The dashboard temperature was 51 degrees, and that was surprising since the reading was in the thirties as I passed through Boulder, CO. I pulled on my fleece hoodie and stuffed my raincoat and a long sleeve undershirt in my backpack along with my lunch. I selected my Loomis two piece five weight for my casting tool, and I departed on the one mile downhill trail. I knew I would pay for the downhill on the return, but that is part of the South Boulder Creek bargain.
I began my day with a peacock hippie stomper and size fourteen deer hair caddis on the off chance that the fish would be looking up. No dice. After twenty minutes of inaction, I converted to a dry/dropper configuration that included an amber ice dub body chubby Chernobyl and a psycho prince. The combination was equally ineffective, so I swapped the psycho prince for a regular prince, and the pairing was ignored. I suspected that I was not drifting deep enough, so I added a second nymph in the form of a hares ear. Once again no response was forthcoming. Finally before lunch I swapped the hares ear for an olive perdigon to gain depth, but my morning ended with a fish count of zero. I did note a refusal to the chubby Chernobyl, and I temporarily hooked a fish on the chubby as well.
Another View of My Favorite Pool
The sun was out bright, so I removed my fleece hoodie and knotted it around my waist under my waders. It worked, but the fit was rather tight. It was obvious that the trout were not interested in nymphs, so I abandoned that approach and returned to a double dry fly gambit. I pulled a classic Chernobyl ant from my box and placed it in the first position, and then I added a deer hair caddis. Between 12:30PM and 2:00PM I cycled through a number of dry flies, but I could not unlock the code. There was the hippie stomper, a yellow stimulator, a size 14 olive-brown deer hair caddis, a size 14 gray stimulator, a black parachute ant, and a Jake’s gulp beetle. The stimulators and caddis provoked refusals, but my fish count remained mired on zero.
At this point I encountered a gorgeous pool; my favorite on the stream. The hippie stomper and beetle remained on my line, but the shutout continued. I swapped the beetle for a size 16 olive-brown deer hair caddis, and I nicked a small trout, but then the creek residents once again ignored my offerings. I waded to the tail of the pool below the right bank, where some side channels fed into the pool in some short runs. I could see quite a few trout in front of me, and they were rising and sipping something small on a very irregular basis. I tried an ant and a CDC BWO, and I was able to monitor the reactions of three very respectable trout to my right. They ignored my offerings. Finally I decided to try the new kid on the block, the mole fly. Guess what?Two trout charged to the surface and smacked the mole, and I was on the board with two landed fish.
I persisted with the mole fly for another fifteen minutes, but it was treated like inert flotsam. I cycled through a soft hackle emerger fished dry and a tiny CDC BWO, but those flies were ignored, so I moved above the pool. The next set of attractive pockets were much faster moving, and the tiny baetis imitations seemed futile without actually seeing rising fish, so I reverted to the size 14 olive-brown body deer hair caddis. Once again I only exercised my arm, so I exited and began my arduous return hike.
When I reached a spot, where I was forced to wade along the edge to progress back to the car, I paused to make some casts, and much to my amazement, I landed a small rainbow and a small brown trout. This lifted the fish count to four, and I was very thankful for that meager tally. I returned to the fishermen path and hoofed back to the car. During the one mile uphill I paused every .3 miles to drink water, catch my breath and rest my muscles. I made it.
Tuesday was a very slow day. There were very few insects present, and that may explain the lack of action. I tried quite a few flies and methods, but none delivered consistent results. I will probably give South Boulder Creek a rest before I return.
Fish Landed: 4

Upstream
First Fish of the Day
Handful
Home to a Lot of Fish
Take Two
Wide Pocket Yielded
Whoa! What a Start!
Slick Produced
Zoomed
Better Sense of Width
Home of Brute Rainbow
The Large Pool
Perfect
Swirling Area Behind Exposed Rock Produced
The Scene at the Start
A Bit More Chunk
Side Channel
This Area Yielded Quite a Few
One of the Perdigon Chasers
Long Middle Pocket
Caddis Worked Along the Bank
Early Action in This Section
Prime Shape
Pleased with This Catch
Wide Moderate Depth Riffle
Head Shot
A Brown Emerged from This Hole
Section Number Three
Now We Are Talking
Beast of a Rainbow
Love It
This Chubby Eater Surprised Me
The Release Suggests the Size
Another Fine Spot Bankside
This Spot Teased Me
Big Gap in My Grip
Rainbow of Similar Size
Scene of Bank Eaters
Promising Ahead
Nice Moderate Depth and Velocity
Mole Fly Produced
Gorgeous
Fought Hard
Fish of the Week
Very Pleased
Emerged from in Front of the Large Exposed Rock
Goodbye Rainbow
Rainbow Was From This Run
Pointed Back
Nice Section Ahead
Nice Chunk
Two Trout Came from This Area
New Setup
First Fish of the New Year
Beast Filled the Net
Olive Perdigon Still Stars
Long Brown Trout
Great Trough
This Was a Hot Spot
Best Brown of the Day
Refurbished Nymph
Side View
Love This Shot
Twenty-Five Salvations