Red Rock HUC8 10020001
A 5,995 km² sub-basin of the Missouri 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
54
Moderate
Drought index
191
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
100%
of 2 reporting
Median flow
49%
p21 of record
Water assets
1,147
55 springs · 87 wells
USGS gauges (2)
- Red Rock R bl Lima Reservoir nr Monida MT0601250017 cfsp19 · below normal
- Red Rock Cr ab Lakes, nr Lakeview, MT0600600023 cfsp23 · below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 191 | 0 | 2/2 | p21 |
Top water assets
- 69Burnt Willow Creekriver
- 69Big Sheep Creekriver
- 69Long Creekriver
- 69Sage Creekriver
- 69Bean Creekriver
- 69Red Rock Cr Ab Lakes, Nr Lakeview, Mtriver
- 69Big Sheep Creekriver
- 69Red Rock R Bl Lima Reservoir Nr Monida Mtriver
- 69Horse Prairie Creekriver
- 69Horse Prairie Creekriver