Fly fishing report · West

South Platte River 11-Mile Canyon

An Eleven Mile Canyon South Platte report for the tailwater below Eleven Mile Reservoir, with flow checks, access fees, hatches, flies, and special rules.

Check flow & weather

Today's river scoreMedium source confidence

Poor

Best option: Wade.

Wading is the most sensitive plan today. Use protected edges only, avoid crossings, and downgrade quickly if clarity or current feels wrong.

Updated Jul 13, 11:17 PM UTCLive sources checked regularly

Recommended approachWade

Mode scores adjust the river-wide score for the risks of wading, bank fishing, or floating.

Wade · Best fit6/100

Wading is the most sensitive plan today. Use protected edges only, avoid crossings, and downgrade quickly if clarity or current feels wrong.

Bank / edgeCheck

This report does not describe this as a primary mode. Verify legal access, depth, launches, and retreat options before planning around it.

FloatCheck

This report does not describe this as a primary mode. Verify legal access, depth, launches, and retreat options before planning around it.

Confirm before you leave

Flow and weather right now.

Use the flow trend to confirm the score before you leave. Weather can change the safest and most productive fishing window.

River strategy

Fish it as a technical canyon tailwater.

Eleven Mile Canyon is a distinct South Platte plan below Eleven Mile Reservoir. The river is accessible, productive, and heavily used, so current flow, rules, and etiquette matter.

Use RiverReports and the Colorado DWR PLAGEOCO station for current flow context.
USFS manages Eleven Mile Canyon as a fee recreation area with designated use rules.
CPW identifies the river as a year-round catch-and-release tailwater with brown, rainbow, and cutbow trout.
Expect small flies, careful presentations, and other anglers in the best pools.

Why this score moved

Best mode nowLowers score

Wade: Wading is the most sensitive plan today. Use protected edges only, avoid crossings, and downgrade quickly if clarity or current feels wrong.

FlowUse caution

RiverReports is linked for the flow chart, but this page does not have a structured live flow value the score can read automatically. Treat the rating as conservative and open the chart before committing.

HeatUse caution

The NWS forecast is near 84F. Fish early and verify water temperature where trout stress is possible.

Short-term weatherUse caution

The forecast has storm or heavy-precipitation risk, so timing and access matter more than the score alone.

SeasonHelps score

Summer: PMDs, caddis, tricos, and terrestrials can work, especially in low light.

Read the water

What changes the plan.

Eleven Mile fishes best when releases are stable and the canyon road and weather are manageable. Slow down, fish small flies well, and respect the tight access corridor.

Low clear release

Use fine tippet, small flies, and long leaders. Approach pools carefully.

Stable medium release

Nymph riffles, pockets, and seams; watch for short dry windows.

Higher release

Add weight, fish soft edges, and avoid crossing where the canyon current is pushy.

Winter

Midges can fish, but ice, narrow roads, and cold canyon shade raise the safety bar.

Field plan

Fish it with intention.

Best flows

Use the RiverReports Eleven Mile chart and Colorado DWR Lake George station together. Stable releases are the most useful signal for small flies and sight fishing; sharp release changes or pushy water should keep you on edges or send you to another South Platte option.

When to skip

Skip the canyon when fee-area access, parking, or current rules are unclear, when flows make safe wading unrealistic, when ice or storms make the canyon hazardous, or when crowding would force you into poor etiquette or unsafe water.

Local plan

Choose the canyon plan before tying on flies: lower pullouts for quick technical checks, quieter mid-canyon water when parking allows, or a pivot to nearby South Park water if flows, weather, or people stack against the day.

Backup water

If Eleven Mile Canyon is too crowded, icy, or release-sensitive, compare the broader South Platte River, Middle Fork of the South Platte, or Tarryall Creek after checking current flow, access, and regulation details.

Hatches & flies

Bring a flexible box.

TimingWhat to watchUseful flies

WinterMidges and tiny olivesZebra midge, black beauty, top secret midge, RS2

Reviewed pattern · report says “Zebra midge”Zebra MidgeLook for a very slim tapered thread body, evenly spaced contrasting wire rib, a small bead, and no tail or wing. The reviewed classic is black with silver wire and a silver bead. Red, olive, brown, glass-bead, jig-hook, resin-coated, or tailed forms must remain labeled variations rather than replacing the classic identity.See photos & how to fish it

Reviewed pattern · report says “black beauty”Black Beauty MidgeA very slim black thread body, fine silver rib, and small dark thorax define the core Black Beauty. Glass-bead Mercury Black Beauty and flash-wing variants must stay labeled separately.See photos & how to fish it + 2 more reviewed guides in the Fly Box

SpringBWOs, midges, caddisBWO emerger, juju baetis, caddis pupa, mercury midge

Reviewed family · report says “BWO emerger”Blue-Winged Olive PatternsBWO describes a hatch group, not one fly. Nymph, emerger, dry, cripple, and spinner profiles must stay separate because they occupy different parts of the water column.See family guide

Reviewed pattern · report says “juju baetis”Juju BaetisA narrow segmented body, dark wing case, compact thorax, and sparse tail define the Juju Baetis. Bead, color, and flash choices are meaningful variants.See photos & how to fish it + 2 more reviewed guides in the Fly Box

SummerPMDs, tricos, caddis, terrestrialsPMD, trico spinner, elk hair caddis, ant, beetle

Reviewed family · report says “PMD”Pale Morning Dun PatternsPMD names an insect group, not one fly. Pale nymphs, trailing-shuck emergers, upright or low-riding duns, cripples, and spent-wing spinners stay visibly separate.See family guide

Reviewed pattern · report says “trico spinner”Trico SpinnerThe reviewed dry form is extremely sparse and flat, using a black body or thread head and pale spent wing. A weighted Sunken Trico Spinner is a separate variant.See photos & how to fish it + 3 more reviewed guides in the Fly Box

FallBWOs, midges, October caddisBWO dry, zebra midge, October caddis, small streamer

Reviewed family · report says “BWO dry”Blue-Winged Olive PatternsBWO describes a hatch group, not one fly. Nymph, emerger, dry, cripple, and spinner profiles must stay separate because they occupy different parts of the water column.See family guide

Reviewed pattern · report says “zebra midge”Zebra MidgeLook for a very slim tapered thread body, evenly spaced contrasting wire rib, a small bead, and no tail or wing. The reviewed classic is black with silver wire and a silver bead. Red, olive, brown, glass-bead, jig-hook, resin-coated, or tailed forms must remain labeled variations rather than replacing the classic identity.See photos & how to fish it + 2 more reviewed guides in the Fly Box

Arrive with a backup parking plan because canyon pullouts fill quickly.

Use light tippet and precise depth control before changing through a dozen flies.

Fish the tailout and near edge before stepping into the pool.

Keep dogs leashed and follow USFS day-use rules.

Respect other anglers in the narrow canyon corridor.

Access & responsibility

Know the entry. Know the exit.

Check current Colorado special regulations for the reach from Eleven Mile Dam through the canyon. CPW lists artificial flies and lures only with all trout returned immediately for key canyon water.

Eleven Mile Canyon entrance

USFS fee-area access via County Road 96 with narrow canyon driving and designated use rules.

Wagon Tongue and Springer Gulch area

Important regulation-boundary and access context for the below-dam tailwater.

Cove, Spillway, and canyon pullouts

Common named canyon access areas where parking, pressure, and posted rules matter.

Transparent sources

Check the facts behind the plan.

Last material review: 2026-05-31

flowRiverReports: South Platte at Eleven Mile Canyon flowColorado DWR station: South Platte near Lake George accessUSFS Eleven Mile Canyon Recreation Area backgroundColorado Parks and Wildlife South Platte River regulationColorado fishing special regulations safetyNational Weather Service forecast point near Eleven Mile Canyon

Common questions

Before you leave.

Is Eleven Mile Canyon the same as Deckers?+

No. It is a separate South Platte tailwater below Eleven Mile Reservoir near Lake George.

What flow should I check?+

Use RiverReports and the Colorado DWR PLAGEOCO station for canyon release context.

Are there fees?+

USFS lists a vehicle day-use fee for Eleven Mile Canyon. Check current fee and pass details before entering.

What flies should I bring?+

Bring midges, RS2s, BWOs, PMDs, tricos, caddis, small terrestrials, and small streamers.