Little Bighorn HUC8 10080016
A 3,359 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
50
Moderate
Drought index
245
Severe
Area in D2+
44.79%
0% exceptional (D4)
Gauges below normal
75%
of 4 reporting
Median flow
57%
p12 of record
Water assets
1,501
2 springs · 409 wells
USGS gauges (6)
- Little Bighorn River near Hardin MT0629400016 cfsp5 · much below normal
- Little Bighorn River nr Crow Agency MT0629350038 cfsp11 · below normal
- Little Bighorn River at State Line nr Wyola MT0628900076 cfsp13 · below normal
- Agency Canal Tailwaste near Hardin MT0629389015 cfsp55 · normal
- Little Bighorn R bl Pass Cr nr Wyola MT0629050088 cfsno long-term record
- Lodge Grass Cr ab Willow Cr diversion, nr Wyola MT0629150021 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 245 | 44.79 | 3/4 | p12 |
Top water assets
- 69Wagon Box Creekriver
- 69West Fork East Pass Creekriver
- 69Little Bighorn Riverriver
- 69West Fork East Pass Creekriver
- 69Bear Trap Creekriver
- 69Little Bighorn Riverriver
- 69Little Bighorn Riverriver
- 69Dry Fork Little Bighorn Riverriver
- 69Lodge Grass Creekriver
- 69Dry Fork Little Bighorn Riverriver