Elevenmile Canyon
14 Day Forecast: Look for sporadic hatches of midges.
Effective Patterns: #20-22 Top Secret Midge, #20-22 Manhattan Midge, #20-22 Jujubaetis, #20-22 Top Secret Baetis, #20-24 Chocolate Foam Wing Emerger, #18 Micro Egg, #20-22 Red Larva, #20 Mercurry Blood Midge, #20 Flashback Mercury Black Beauty, #20 Buckskin, #20-22 Pat's Midge, #20-24 Griffith Gnat, #22 Mole Fly, and #22-24 Parachute Adams.
Measurements
Elevenmile Canyon Stream & Fly Fishing Conditions on the South Platte River in Colorado
The South Platte River below Elevenmile Reservoir is absolutely beautiful. The South Platte River tumbles and twists through a majestic canyon as it carves its way downstream to the small community of Lake George. Parts of the scenic canyon remind you of the fabled Cheesman stretch while others look much like the renowned Deckers area. Elevenmile Canyon is a great winter and early spring fishery with tremendous opportunity to consistently hook nice fish. The river is loaded with Rainbows and Cut-bows with the occasional brown trout.
The average fish ranges between 12 and 17 inches and are strong as an ox. Occasionally you will hook fish between 17 and 24 inches in the upper reaches below the dam. The river is comprised of riffles, runs, shelves, gravel bars, and nice pocket water. The scenery is fabulous with logjams, huge granite boulders, fallen trees, waterfalls, and bald eagles soaring above the canyon’s lip. The ideal flow for Elevenmile Canyon is between 150 and 250 cfs. The best fishing is in the upper two miles. The aforementioned two-mile stretch is flies and lures only. This section is catch and release and all fish must be returned to the water immediately. Pinch down your barbs and protect this incredible resource.
Eleven Mile Canyon is known for its superb dry fly fishing. The Trico hatch is one of many that anglers should concentrate their efforts on. Mark Adams photo
Tips & Other Information:
Flows are currently at 58 cfs and will remain there until Denver Water begins draining Antero Reservoir. According to Denver Water, “Antero outlet flow will ramp up to 75 cfs on 5/2 and 250 cfs on 5/3. It will stay at 250 cfs until 6/1 when they begin ramping down. Flows from Spinney to and Cheesman will follow suit, but be delayed slightly by the travel time between locations. So, high flows throughout the system from May into early June is to be expected.” In the mean time, concentrate your efforts on the midge-bite in the morning and blue-winged olives in the afternoon. As the flows ramp up, larger atractors, aquatic worms, scuds, and leeches will be key as an attractor. Revised 5/11/26