Minor Flood
8 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
7.5 ft
Minor flooding along the south bank.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | 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 |
About This Gauge
USGS Site
NWS LID
BTMM8
River
Boulder River
County
Sweet Grass, MT
Coordinates
45.8338°N, 109.9387°W
Get Flood Alerts for Boulder River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Boulder River at Big Timber?
The Boulder River at Big Timber gauge is maintained by USGS (site 06200000) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Boulder River at Big Timber?
The NWS-defined flood stage for Boulder River at Big Timber is 8 feet. Action stage begins at N/A feet. Moderate flooding starts at N/A feet, and major flooding at N/A feet.
How do I get alerts when Boulder River rises?
Download StormCast free on Google Play, go to River Gauges, and add Boulder River at Big Timber to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Boulder River at Big Timber gauge located?
The gauge is located in Sweet Grass County, Montana at coordinates 45.8338°N, 109.9387°W. USGS site number: 06200000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Stage may be affected by ice during winter months.
- River forecasts will be issued for this location when the water level reaches 1.5 feet from flood stage.