Time: 10:45AM – 3:00PM
Location: Eleven Mile Canyon
South Platte River 10/05/2026 Photo Album
With a non-fishing trip planned to the mountains later in the week, I felt I needed to take advantage of Monday, October 5, 2026 with another day trip. The South Platte River was running at a steady 67 CFS, and fly shop reports indicated that tricos and pale morning duns were still present along with early stages of fall blue wing olives. That information was enough to convince me to make the drive to Eleven Mile Canyon.
Love the Look of the Water In the Background
I arrived at my chosen section of the canyon at 10:15AM, and the dashboard temperature was 56 degrees. Much of the stretch that I was about to fish was covered with shade, so I decided to wear my raincoat for warmth. I wore it the entire day, although there were a few times, when I was in full sunlight, and I was overheated. My fly rod of choice was my Sage R8 four weight, since I love casting it, and the wide open South Platte River is a benign environment for a fly rod.
By 10:45AM I was perched along the bank, and I began my day with a size 8 tan pool toy hopper, a salvation nymph and an olive perdigon. In the first hour from 10:45AM until 11:45AM, when I broke for lunch, I landed five trout. Needless to say I was rather pleased with this result. The first fish was a surprise thirteen inch rainbow that slammed the hopper. The remaining four were brown trout, and they all snatched the olive perdigon. I saw two tricos, but a surface feeding trico spinner event never materialized. I suspect one needs to be in the first couple miles below the dam for a true trico experience.
After lunch I continued with the dry/dropper, and I raised the fish count from five to nine with nearly all the takes attributable to the olive perdigon. There may have been one salvation customer.
By 1:30 I began to see a few random blue wing olives in the air, but no surface rises were evident. I decided to test a RS2 which imitates the nymph state of a blue wing olive. I moved the olive perdigon to the upper position, and I found a 20 incher with a one foot section of monofilament attached. I knotted the mono to the eye of the olive perdigon, and rather than remove the 20 incher in favor of the RS2, I decided to give the large stonefly imitation a trial.
It did not perform well, and it seemed to be snagging and creating an unnatural drift, so I finally conceded to my initial inclination and tied on a size 22 RS2. The RS2 worked its magic, and I landed three trout on the tiny nymph to bring the fish count to thirteen. All the RS2 takes were associated with a swing or lift at the end of the drift, so the trout were attracted to an emerging or escaping nymph.
At 2:30PM I arrived at a gorgeous pool with a center cut current that fanned out into a nice long pool. The pool was not entirely smooth and contained small swirly surface riffles. I began to see sporadic rises among this perfect pool environment, and more tiny blue wing olives were present than earlier.
I concluded that I should commit to dries, so I removed the dry/dropper rig and converted to a peacock hippie stomper and a mole fly. I waited until I spotted one of the random rises in order to locate a fish, and I began popping the double dry to the vicinity of rises. This approach entailed a fair amount of waiting, as the rises were spaced out time wise, and prospecting seemed futile. Eventually I popped a cast toward the swirly center section, and a brown trout pounced on the mole fly.
I thoroughly dried the mole fly, so that it would float and be visible, and after quite a few casts, I tossed one to the entering current right above me, where I had seen a solid rise. Wham! A solid thirteen inch rainbow clobbered the hippie stomper and increased the fish count to fifteen. In the process of landing the rainbow, the mole fly broke off, so I replaced it with another, but the rainbow that ate the stomper would be my last catch of the day. I swapped the mole fly for a soft hackle emerger fished dry for the final fifteen minutes, but I quickly ended up with a tangle, and that ended my day.
Fifteen trout on a section of the South Platte in Eleven Mile never before fished was a success in my book. I landed a fourteen inch brown trout before lunch, and three chunky rainbows in the thirteen inch range joined the parade. Add a few twelve inch browns and a remaining population of sub-twelve inchers, and that equals a fine day of autumn fly fishing. I would not mind returning on a cloudy day to see, if the BWO hatch intensifies.
Fish Landed: 15

Rainbow Haven
Trough Productive
Flabby Belly
Prime Run
Another Fine Bow
Juicy Spot
Pool Had Rising Fish
Surprised by This Hopper Eater
Hopper Take in Current Seam Along the Bank
Nice Little Run Boulder to Boulder
Different Light
Behind the Large Exposed Rock
Held Above the River
Another Bank Eater
Quite a View
Rainbow Home
Streamer Eater
Respectable
Right Braid
Dipper Nest
Big Grip
Pleased
Next to Exposed Rock Produced
Fish of the Day
Eddy Home of Large Brown