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South Platte — Eleven Mile Canyon

Tailwater · Eleven Mile Reservoir to Lake GeorgeGold MedalFishing Well
57

● Live flow from USGS · water temp from sample (no temp sensor at this gauge)

2 cfs
Flow
47°F
Water temp
39.145, -105.160
Location · USGS gauge
60–250
Ideal flow · cfs
Conditions · water 43–50°F

~103 cfs (SPFS late-June: 'low for this time of year' — Antero draw-down complete) · canyon continues to fish well — a bug factory · midges, BWOs, Tricos, PMDs, caddis; sight-fishing the play, stop once water hits 68°F

Strategy

SPFS site still dated 4/27 (most recent on site as of 6/4): 11-Mile flows bumped to the 300+ cfs range (SPFS Jun, similar to Cheesman/Deckers on the heat-driven melt/releases). Canyon continues to fish well. With Dream Stream and Deckers flows being sporadic, crowds at 11-Mile remain elevated, especially weekends — weekday windows the play. Sparkle dun, EHC, Para Adams or extended-body BWO up top with sprout midge, Matt's midge, Griffith's, mole fly dropper. Today (Wed) ~78°F South Park, mild and pleasant, the real heat building toward midweek; the real heat building toward midweek.

Detailed report

FLOW CORRECTED to ~103 cfs (SPFS late-June: 'low for this time of year'; Antero draw-down complete) — down from the reservoir-release weeks but still fishing well as a bug factory. Strong dry-fly: midges, BWOs, Tricos, PMDs, caddis; sight-fishing; fish the lower 'baitwater' canyon to dodge crowds; stop once water hits 68°F. Weekend pressure heavy, weekday windows the play. South Park pattern: today (Wed) ~69°F, partly sunny with afternoon thunderstorms; storms ease and temps warm into midweek.

Report: South Platte Fly Shop · June 26, 2026 (SPFS Eleven Mile page) · South Platte Fly Shop staff

Fly-shop reports

2 shops report on South Platte — Eleven Mile Canyon

Reports are pulled live from each shop when you open this river. Shop wording varies — tap through for the full, original report.

Fishability Score breakdown

How today's 57 is built. Flow 35% · Water temp 25% · Weather 20% · Hatch 20%.

Flow0/100
Water temp100/100
Weather76/100
Hatch match82/100

Weather & hatch are placeholder factors until wired to live sources.

What to throw — by time of day

Morning
Dawn – 11am

Small midge larva #20–22, Baetis nymph #20, scuds #16–18, San Juan Worm, cranefly larva

MiddayNOW
11am – 5pm

Caddis larva #18 (caddis active), BWO emerger #20, eggs (where browns spawned), small stonefly #14

Evening
5pm – dark

Adams #20, BWO #20–22, Griffith's Gnat #20, small Elk Hair Caddis #16

Species
Brown · Rainbow · Cutthroat
USGS gauge 06701700

Seasonal hatch report

In season now

Fall — BWOs & Streamers

Cooling water wakes the fish up. Blue-Winged Olives return on grey afternoons, and pre-spawn browns chase streamers hard.

Morning
Dawn – 11am
Hatching
Midges · BWO nymphs · Trico (early fall)
Flies
Pheasant Tail #18, RS-2 #20, Trico spinner #24
Rig
Nymph deep; streamer the banks early for aggressive browns.
Afternoon
NOW
11am – 5pm
Hatching
Blue-Winged Olives · October caddis (freestone)
Flies
BWO dun #20-22, Parachute Adams #20, October Caddis #10
Rig
Overcast = dry BWOs; otherwise swing/strip streamers for browns.
Evening
5pm – dark
Hatching
BWO spinners · Streamer window
Flies
Sculpin/Woolly Bugger #6-8, RS-2 #20
Rig
Strip big flies through frog water at last light for the biggest fish.
Source: Hatchwise Seasonal Guide · updated Jul 5, 12:00 PM MT. General seasonal patterns — verify against a current local shop report before you go.

Sources & last updated

SourceFeedsMost recent update
USGS 06701700 South Platte — Eleven Mile CanyonOct 1, 1:15 AM MT · flow live
Hatchwise Seasonal GuideHatch & fly guidanceJul 5, 12:00 PM MT · editorial
South Platte Fly Shop Shop fly reportLive — see report
Anglers Covey Shop fly reportLive — see report

Live flow & water temp come straight from the USGS Instantaneous Values service; timestamps are the gauge's own reading times (Mountain Time).