Middle Clark Fork HUC8 17010204
A 5,140 km² sub-basin of the Pacific Northwest region in ID, MT. Drought coverage is from the US Drought Monitor (map of 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
73
Moderate
Drought index
131
Moderate
Area in D2+
0.13%
0% exceptional (D4)
Gauges below normal
0%
of 4 reporting
Median flow
118%
p68 of record
Water assets
1,082
2 springs · 362 wells
USGS gauges (4)
- St. Regis River near St. Regis, MT1235400093 cfsp32 · normal
- Clark Fork at St. Regis MT123545002,910 cfsp59 · normal
- Clark Fork below Missoula MT123530002,640 cfsp77 · above normal
- Clark Fork above Missoula MT123405001,680 cfsp77 · above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 131 | 0.13 | 0/4 | p68 |
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