Madison River below Ennis Lake
Madison River · Montana · USGS gage 06041000
Lower Madison below Ennis Lake near McAllister (top of Beartrap Canyon). Warmer than the upper river; strong caddis and stonefly life.
Water
44°F
Flow
1,250 cfs
Air
39°F
Sky
19%
Pressure
29.94 in
Wind
6 mph
Predicted hatches · 2026-10-30
ConfirmedBlue-Winged OliveBaetis spp.1.00
Model says likely and 3 recent reports confirm it. water 6.5°C (44°F) sits in the prime band (6-11°C); peak season; 8 days sustained ≥4°C; watch midday, especially overcast afternoons.
reports: The Rivers Edge — Lower Madison Report, Rising Trout Outfitters — Lower Madison Report, Yellow Dog Flyfishing — Lower Madison Reports
flies: BWO Sparkle Dun #18-22, RS2, Pheasant Tail #18
PredictedMidgeChironomidae0.50
Predicted by conditions; no reports yet. water 6.5°C (44°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.