Montana ·
Rock Creek Fly Fishing Report - June 14, 2026
ROCK CREEK
ReportJUN 14 — 21, 2026
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Flow
917CFS
Rock Creek near Clinton MT
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Water Temp
53.4°F
Updated 2026-06-14
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Weather
41–78°F
Mostly Clear
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Clarity
Clear
Check post-storm
Rock Creek is running at 917 cfs and 53.4°F — flows have dropped noticeably from last week's 1,300 cfs peak and are becoming increasingly fishable, with improving clarity throughout the upper and middle reaches. Wading remains pushy in the main channel; work softer edges, inside bends, and protected pockets where trout have stacked up to escape the current.
What's Working — Hot Flies
Tungsten Pat's Rubber Legs - Tan & Brown #6
#6
Olsen's Straggle Stone Brown Barbless #12
#12
Coffey's CH Sparkle Minnow Sculpin #6
#6
Egan's GTI Caddis - Olive #12
#12
Corn-fed Caddis (CDC) Tan #20
#20
Blowtorch - Hare's Ear #12
#12
Egan's Thread Frenchie Jig - Olive #12
#12
Tungsten Split Case Nymph - PMD #20
#20
Soft Hackle Pheasant Tail Jig - Barbless #12
#12
Bionic Ant 2.0 - Black #16
#16
Hatch Chart
| Insect | Size | Activity | Prime Time |
|---|---|---|---|
| Salmonfly (Pteronarcys californica) | #4–6 | Peak — hatch pushing into upper stretches | Midday to late afternoon on warm sunny days |
| Golden Stonefly | #6–8 | Building — lower to mid-creek, following Salmonflies upstream | Afternoon into evening |
| Green Drake (Drunella grandis) | #10–12 | Emerging — best on overcast afternoons | Late morning to early afternoon on cloudy days |
| Yellow Sally (Isoperla) | #14–16 | Active — scattered throughout the drainage | Afternoon |
| Caddis (various) | #16–20 | Good — evening flights building | Evening to dusk |
| Pale Morning Dun (PMD) | #16–18 | Beginning — early-season emergence | Late morning |
Best Time Window
- Late morning to mid-afternoon (10am–2pm): Salmonfly and Golden Stone dry-fly action peaks as air temps climb toward 74°F; focus on upper stretches and soft bank water
- Early afternoon to late afternoon (1pm–5pm): Yellow Sally and Green Drake activity builds — cloudy breaks in the afternoon will supercharge the Green Drake emergence
- Evening (6pm–dusk): Caddis flights intensify along riffled edges and tailouts; switch to a CDC caddis pattern and work slower water as light fades
Guide's Tip
From the benchWith flows at 917 cfs and dropping, the Salmonfly hatch is your headline act — drive past the lower canyon and target the upper stretches where the big bugs are most concentrated and trout are looking up. On this sunny Sunday forecast (high of 74°F), expect the best dry-fly action from roughly 11am through 4pm as air temps warm and bugs get airborne; focus every cast on the soft water — inside bends, protected eddies, and shallow gravel shelves along the banks. If you're not seeing surface activity, go deep with a heavy stonefly nymph tight to the bottom in those same soft-water lies. Note: the Lower Fire Ring to Elkhorn stretch has a fresh log blocking the corner — scout that run carefully before committing.
Main Species
Westslope Cutthroat Trout
Rainbow Trout
Brown Trout
