All rivers

South Platte — Waterton Canyon

Tailwater · Strontia Springs Dam to ChatfieldClass 1Fishing Well
73

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

22 cfs
Flow
49°F
Water temp
39.484, -105.002
Location · USGS gauge
40–120
Ideal flow · cfs
Conditions · water 45–52°F

~68 cfs (Rise Beyond June podcast: 'holding steady around 68 cfs—prime for technical drifts and clear-water stalking') · canyon fully reopened · BWO/midge subsurface still dominant, caddis + yellow sallies emerging

Strategy

Closest quality water to Brighton. Easy hike-in (or bike — 3.3 mi to Marston Diversion). Per Rise Beyond June: flows up to ~68 cfs, 'prime for technical drifts and clear-water stalking.' BWOs and small midges still dominating subsurface, caddis and yellow sallies emerging, trico season nearly here. Late morning through early afternoon best window. Trailer pupae/emergers behind a searcher nymph. Today (Sun Jul 5) ~91°F plains, sunny and hot — fish morning through midday before canyon shade returns ~3 PM; scattered storms Tue–Wed.

Detailed report

Canyon reopened after Denver Water's dust-mitigation closure (April 27–May 8). Rise Beyond June podcast: 'flows holding steady around 68 cfs — prime for technical drifts and clear-water stalking.' June hatch activity: midges + BWOs still dominating subsurface, caddis and yellow sallies emerging, trico season nearly here. Recommended: Parachute BWO #20-22 for late morning risers, RS2 + Zebra Midge combo #20-24 deep seams, Mini Leech/Thin Mint streamer in low light. 5X lead, 6X dropper. Trail fully dried. Bite shuts down once canyon shadows return ~3 PM. Pattern: today (Sun Jul 5) ~91°F plains, sunny and hot; scattered storms Tue–Wed, heat rebuilds late week. Strontia Springs construction traffic ongoing.

Report: Rise Beyond Fly Fishing / Rocky Mtn Anglers · June 4, 2026 · Rise Beyond staff + Rocky Mtn Anglers

Fly-shop reports

1 shop report on South Platte — Waterton 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 73 is built. Flow 35% · Water temp 25% · Weather 20% · Hatch 20%.

Flow46/100
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

Pat's Rubber Legs (anchor) + RS-2 #20, Pheasant Tail #18, Black Beauty #22, Guide's Choice Hare's Ear

MiddayNOW
11am – 5pm

Caddis pupa #16, Barr's Emerger #20, San Juan Worm #14, Rainbow Warrior #18, Copper John, Psycho Prince Nymph

Evening
5pm – dark

Adams #18, midge cluster #20, JuJu PMD #18, soft hackle swing

Species
Rainbow · Brown · Cutbow
USGS gauge 06709500

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 06709500 South Platte — Waterton CanyonJun 2, 11:00 PM MT · flow live
Hatchwise Seasonal GuideHatch & fly guidanceJul 5, 12:00 PM MT · editorial
Rise Beyond Fly Fishing 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).