Lamar River near Tower Ranger Station Ynp
Lamar River · Rockies · USGS gage 06188000
Coldwater (summer mean 15.7°C — prime coldwater).
Water
38°F
Flow
138 cfs
Air
36°F
Sky
100%
Pressure
29.94 in
Wind
2 mph
Predicted hatches · 2026-10-30
PredictedMidgeChironomidae0.50
Predicted by conditions; no reports yet. water 3.3°C (38°F) sits in the prime band (1-10°C); shoulder of the season; 8 days sustained ≥0°C; 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.