Muddy Creek Near Shoshoni
Muddy Creek · Rockies · USGS gage 06258000
Trout (marginal) (summer mean 19.5°C — trout, warm in summer).
Water
75°F
Flow
22 cfs
Air
73°F
Sky
74%
Pressure
29.84 in
Wind
6 mph
Predicted hatches · 2026-07-31
PredictedHopper / TerrestrialsAcrididae (grasshoppers)0.50
Predicted by conditions; no reports yet. water 23.7°C (75°F) sits in the prime band (17-24°C); shoulder of the season; 8 days sustained ≥14°C; watch warm, breezy afternoons.
flies: Morrish Hopper #8-12, Chubby Chernobyl, Dave's Hopper
PredictedHexagenia (Hex)Hexagenia limbata0.42
Predicted by conditions; no reports yet. water 23.7°C (75°F) is cooling past the prime band (19-23°C); shoulder of the season; 8 days sustained ≥18°C; bright moon — night activity; watch after dark — the famous night hatch.
flies: Hex Dun #4-8, Hex Nymph, Hex Spinner
PREDICTED from the first-principles model only. Report-confirmed signal (fly-shop & forum reports) is the next milestone.