Generated regional Colorado river scene for South Platte River 11-Mile Canyon planning; not an exact location photo
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Fly fishing report · West

South Platte River 11-Mile Canyon

Is South Platte River 11-Mile Canyon worth the trip today? Check flow, weather, hatches, access, and rules for Colorado before you go.

See the flow chart ↓

Generated artwork: BlueStreamFly · Regional illustration; not the exact location.

Good day to fish?Latest river check
Poor

Not today. Make another plan.

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.

See update time and confidence
Live data checkMediumHow much of the live flow, weather, and alert data came back.
Today's callLowNo structured live flow
Score calculated Aug 22, 2026, 10:23 PM MDTSources checked often
Best access methodWade

These scores compare the risks of wading, bank fishing, and 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 / edgeNot recommended

This report does not recommend bank fishing on this reach.

FloatNot recommended

This report does not recommend floating this reach.

Your plan

Today's South Platte River 11-Mile Canyon plan.

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.

Check first
Use RiverReports and the Colorado DWR PLAGEOCO station for current flow context.
Try
Arrive with a backup parking plan because canyon pullouts fill quickly.
Leave when
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.

Live river check

What the river is doing

Check the latest flow and weather before you go. A quick change can make the river harder or less safe to fish.

Showing the latest stored river check while current readings load.
Flow
Live flow is not available here.
Air now
59°F

Current NWS forecast period

Next 24h high
82.0°F

NWS air forecast near

Rain chance
22%

For this forecast period

This is an air forecast, not a river-temperature reading. Check the water with a stream thermometer before fishing in hot weather.

Latest stored weather check

Slight Chance Rain Showers

Slight Chance Rain Showers

Wind
3 mph
Weather checked
More forecast and source details
National Weather Service

Eleven Mile Canyon forecast point

The National Weather Service forecast is temporarily unavailable.

Live data

Where these readings come from

RiverReports gauge: South Platte River at Eleven Mile Canyon

How to fish it

How to fish South Platte River 11-Mile Canyon today.

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 area.

01

Low clear release

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

02

Stable medium release

Nymph riffles, pockets, and seams. Watch for short dry windows.

03

Higher release

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

04

Winter

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

Fishing words used on this page
Cubic feet per second (cfs)
Cubic feet per second, or cfs, shows how much water passes the gauge each second.
Technical fishing
Technical fishing means the fish are hard to fool, so careful casts and natural drifts matter.
Nymph
A nymph is a young water insect. Anglers also use the word for a fly that copies it.
Presentation
Presentation means how you cast and move the fly so it looks natural to a fish.
Riffle
A riffle is shallow, fast water broken by rocks.
Seam
A seam is the line where fast and slow water meet.
Tailout
A tailout is the shallow, slower water at the lower end of a pool.
Blue-winged olive (BWO)
Blue-winged olives, or BWOs, are small mayflies that often hatch in cool or cloudy weather.
Caddis
Caddis are small water insects. The adults look a little like tiny moths.
Emerger
An emerger copies an insect as it rises from below the water toward the surface.
Why this call

Why this score

Best mode nowHurts

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 current NWS air forecast is about 59F, and the next 24-hour high reaches about 82F. This is an air forecast, not a water-temperature reading. Fish early and check the river with a stream thermometer.

SeasonHelps

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

Public alertsHelps

No active NWS alert was returned for this forecast point.

Trip notes

Trip notes

Check these before you choose a reach.

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 leave

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 rule details.

What to try

South Platte River 11-Mile Canyon flies through the year.

Match the time of year, then let rising fish and current speed guide the next change.

SeasonWhat to look forFlies to try

Each fly name opens its matching Fly Box guide.

Access and safety

South Platte River 11-Mile Canyon access and rules.

Use these places as starting points. Open the access link below and check posted signs before you park or enter. Check current Colorado special fishing rules 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 rule-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.

USFS lists an Eleven Mile Canyon vehicle day-use fee and no dispersed camping in the canyon.

Dogs must be leashed under USFS recreation guidance.

CPW identifies named access points such as Spillway, Cove, Springer Gulch, and Wagon Tongue Gulch.

Winter ice and narrow canyon roads can complicate access even when the river is open.

Compare another river

If this water does not fit the day, check another report before you start the drive.

River sources

Official South Platte River 11-Mile Canyon sources.

Official agencies and primary river operators come first. Secondary tools are labeled so you know what carries the most weight.

How this report was checked

How this report was checked

Trip guidance checked

What was checked: This Eleven Mile Canyon South Platte report is maintained from RiverReports and Colorado DWR flow data, USFS access information, Colorado regulation sources, CPW river context, weather checks, and technical-tailwater planning guidance.

Live measurements and forecasts keep their provider timestamps. Rules, access, and trip guidance use the source-review date shown here. BlueStreamFly planning advice is editorial interpretation, not an agency notice.

First-hand experience: BlueStreamFly does not claim a first-hand visit or local field test for this report unless a real contributor is explicitly named and linked.

See all 6 checked sources

Rules and closures

Check what is allowed, where the rule applies, and whether the river is open.

Flow and weather

Check the latest river reading and forecast before you leave.

Access and land

Check public entry points, land rules, and seasonal access changes.

More helpful links

Use these links for stocking, safety, and other local details.

Source check is old. Last checked . Open the official links now and check for changes.

See something wrong? Report a source problem. Please do not send private spots or private access notes.

Quick answers

Quick South Platte River 11-Mile Canyon answers.

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.