Clarks Fork Yellowstone HUC8 10070006
A 7,233 km² sub-basin of the Missouri region in MT, WY. 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
63
Moderate
Drought index
255
Severe
Area in D2+
54.98%
0% exceptional (D4)
Gauges below normal
17%
of 6 reporting
Median flow
101%
p53 of record
Water assets
2,399
65 springs · 215 wells
USGS gauges (6)
- Clarks Fork Yellowstone River nr Belfry MT06207500153 cfsp20 · below normal
- Clarks Fork Yellowstone River at Edgar MT06208500290 cfsp38 · normal
- Red Lodge Cr ab Cooney Re nr Boyd MT0621100034 cfsp46 · normal
- Rock Creek near Red Lodge MT06209500177 cfsp60 · normal
- Willow Creek near Boyd MT0621150043 cfsp76 · above normal
- White Horse Canal near Silesia MT0620879020 cfsp79 · above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 255 | 54.98 | 1/6 | p53 |
Top water assets
- 69Wyoming Creekriver
- 69Pat O'Hara Creekriver
- 69Crandall Creekriver
- 69Lodge Pole Creekriver
- 69One Hunt Creekriver
- 69Rock Creek Near Red Lodge Mtriver
- 69Dead Indian Creekriver
- 69Dead Indian Creekriver
- 69Elk Creekriver
- 69Rock Creekriver