Trail Creek At Ketchum
Trail Creek · Rockies · USGS gage 13137500
Coldwater (summer mean 13.6°C — prime coldwater).
Water
56°F
Flow
14 cfs
Air
36°F
Sky
100%
Pressure
29.90 in
Wind
7 mph
Predicted hatches · 2026-10-30
PredictedBlue-Winged OliveBaetis spp.0.23
water 13.4°C (56°F) is cooling past the prime band (6-11°C); peak season; overcast skies favor it; watch midday, especially overcast afternoons.
flies: BWO Sparkle Dun #18-22, RS2, Pheasant Tail #18
PredictedMidgeChironomidae0.22
water 13.4°C (56°F) is cooling past the prime band (1-10°C); shoulder of the season; watch midday, especially cold months.
flies: Zebra Midge #18-22, Griffith's Gnat, Disco Midge
PREDICTED from the first-principles model only. Report-confirmed signal (fly-shop & forum reports) is the next milestone.