RIVER GAUGE · BOULDER RIVER
Boulder River at Big Timber
Sweet Grass County, Montana
Water level0.97 ft
Flow59 cfs
Last readingSep 16, 2026, 4:00 PM UTC (last recorded)
Minor flood8 ft
The past week
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What floods at each level
- 7.5 ft
Minor flooding along the south bank.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Jun 4, 1997 | 9 ft | 9,940 cfs |
| Jun 12, 2022 | 8.56 ft | 11,300 cfs |
| May 31, 2020 | 8.33 ft | 10,400 cfs |
Get an alert when Boulder River rises
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