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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
77
Healthy
Drought index
42
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
25%
of 4 reporting
Median flow
90%
p35 of record
Water assets
1,082
2 springs · 362 wells
USGS gauges (4)
- St. Regis River near St. Regis, MT1235400086 cfsp19 · below normal
- Clark Fork below Missoula MT123530002,260 cfsp34 · normal
- Clark Fork at St. Regis MT123545002,880 cfsp36 · normal
- Clark Fork above Missoula MT123405001,470 cfsp50 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-19 | 42 | 0 | 1/4 | p35 |
| 2026-10-18 | 42 | 0 | 1/4 | p36 |
| 2026-10-17 | 42 | 0 | 1/4 | p38 |
| 2026-10-16 | 42 | 0 | 1/4 | p40 |
| 2026-10-15 | 42 | 0 | 1/4 | p41 |
| 2026-10-14 | 42 | 0 | 1/4 | p41 |
| 2026-10-13 | 42 | 0 | 1/4 | p42 |
| 2026-10-12 | 42 | 0 | 0/4 | p39 |
| 2026-10-11 | 42 | 0 | 1/4 | p33 |
| 2026-10-10 | 42 | 0 | 1/4 | p30 |
| 2026-10-09 | 42 | 0 | 1/4 | p32 |
| 2026-10-08 | 44 | 0 | 1/4 | p32 |
| 2026-10-07 | 44 | 0 | 1/4 | p33 |
| 2026-10-06 | 44 | 0 | 1/4 | p35 |
Top water assets
- 69Rattlesnake Creekriver
- 69Cedar Log Creekriver
- 69Winofall Creekriver
- 69Grant Creekriver
- 69High Falls Creekriver
- 69Wrangle Creekriver
- 69Wrangle Creekriver
- 69North Fork Fish Creekriver
- 67Dry Creekriver
- 67Cedar Creekriver