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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
58
Moderate
Drought index
195
Moderate
Area in D2+
24.5%
0% exceptional (D4)
Gauges below normal
60%
of 5 reporting
Median flow
84%
p22 of record
Water assets
2,399
65 springs · 215 wells
USGS gauges (6)
- Clarks Fork Yellowstone River nr Belfry MT06207500109 cfsp9 · much below normal
- Willow Creek near Boyd MT0621150022 cfsp17 · below normal
- Rock Creek near Red Lodge MT0620950054 cfsp22 · below normal
- Clarks Fork Yellowstone River at Edgar MT06208500458 cfsp29 · normal
- Red Lodge Cr ab Cooney Re nr Boyd MT0621100046 cfsp50 · normal
- White Horse Canal near Silesia MT06208790no readingno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 195 | 24.5 | 3/5 | p22 |
| 2026-10-20 | 195 | 24.5 | 3/5 | p24 |
| 2026-10-19 | 195 | 24.5 | 2/5 | p29 |
| 2026-10-18 | 195 | 24.5 | 3/5 | p21 |
| 2026-10-17 | 195 | 24.5 | 3/5 | p24 |
| 2026-10-16 | 195 | 24.5 | 3/5 | p24 |
| 2026-10-15 | 203 | 24.87 | 1/5 | p37 |
| 2026-10-14 | 203 | 24.87 | 0/5 | p46 |
| 2026-10-13 | 203 | 24.87 | 1/5 | p40 |
| 2026-10-12 | 203 | 24.87 | 1/5 | p47 |
| 2026-10-11 | 203 | 24.87 | 4/5 | p19 |
| 2026-10-10 | 203 | 24.87 | 4/5 | p11 |
| 2026-10-09 | 203 | 24.87 | 5/6 | p13 |
| 2026-10-08 | 225 | 41.43 | 4/6 | p19 |
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