Yaak HUC8 17010103
A 2,051 km² sub-basin of the Pacific Northwest region in CN, 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
75
Healthy
Drought index
179
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
79%
p25 of record
Water assets
203
1 springs · 1 wells
USGS gauges (1)
- Yaak River near Troy MT12304500106 cfsp25 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 179 | 0 | 0/1 | p25 |
Top water assets
- 67Arbo Creekriver
- 67Yaak Riverriver
- 67Yaak Riverriver
- 67East Fork Yaak Riverriver
- 67North Fork Seventeenmile Creekriver
- 67West Fork Yaak Riverriver
- 67Yaak Riverriver
- 67Spread Creekriver
- 67Gilnockie Creekriver
- 67Ward Creekriver