Where to Go South Platte River – Elevenmile Canyon

Open 9 am to 6 pm Daily

Report Date: 10/21/2026

Conditions:

The USGS gauge in Elevenmile Canyon is currently reading at a low seasonal flow of 32 CFS, rendering the granite-lined corridor exceptionally gin-clear and cold. These lean flows have drawn trout entirely out of shallow riffles and pocket water, concentrating non-spawning fish tightly into the deepest plunge pools, dark granite ledge slots, and shaded boulder seams. Mature autumn brown trout are actively staging and spawning on clean gravel tailouts throughout the canyon. Anglers must exercise strict river conservation by avoiding active redds, keeping out of shallow spawning gravel, and focusing all fishing pressure strictly on deeper holding water.

Guide Reports:

Hopper Juan Ramirez - 9-29-2026

Really tough. Cold air temps, very few bugs, therefore very little eating going on.

Joshua Heney - 9-14-2026

Great trico and blue wing hatch pretty slow after that

Weather:

Short Term -

High-country weather along the Elevenmile Canyon corridor over the next 3 days will bring pleasant autumn conditions, with daytime highs reaching the low-to-mid 60s under partly cloudy skies. Mornings open crisp and frosty in the 30s to low 40s before sun-driven warming takes effect. Light to moderate winds will build to 8 to 15 mph by early afternoon, producing a subtle surface chop across quiet canyon pools that helps break up overhead glare.

Long Term -

Extended regional forecasts over the next 10 days point to a steady fall cooling trend across the upper South Platte catchment. Highs will gradually decline into the upper 40s and 50s, while overnight lows consistently drop into the 20s, bringing hard morning valley freezes. Steady tailwater releases out of Elevenmile Reservoir will preserve stable water temperatures, buffering the stream against cold air drops and preserving predictable midday feeding windows.

Hatches: 

Midges in black, cream, and olive remain the primary daily hatch, emerging steadily during calm morning and early afternoon windows. Fall Blue-Winged Olives offer reliable dry-fly opportunities on overcast or drizzly afternoons, particularly along quiet foam lines and gentle tailouts. Freezing night temperatures have brought terrestrial hopper and ant activity to a halt, and trout are feeding almost exclusively on subsurface midge pupae, Baetis emergers, and small attractor nymphs.

Tactics:

Clear water and high fish selectivity require long leaders (9 to 12 feet) tapered down to 5X or 6X fluorocarbon tippet. Minimize bank movement and avoid wading through shallow runs. Multi-fly nymph rigs or drop-shot setups fished deep with minimal weight through plunge pools and boulder pockets produce the most consistent action.

Tips:

Rig multi-fly nymph setups with small midge emergers, Baetis nymphs, tiny scuds, or small leech and worm point patterns fished deep along bottom seams. For surface feeders, present small midge dry flies or BWO emergers along soft foam lines. Park only in designated turnouts along Eleven Mile Canyon Road and avoid blocking narrow canyon passes.

This is an area where we offer guided walk/wade trips, and we are one of the only outfitters permitted to do so in 11 Mile Canyon. Please give us a call if you are interested! (We are currently only offering full-day trips here)