Montana State River Flows

mallards rest winter

Click on each river’s name to view USGS streamflow data.

Beaverhead River

Big Hole River

Bighorn River

Bitterroot River

Blackfoot River

Boulder River

Clark Fork River

Flathead River

East Gallatin River

Gallatin River

Jefferson River

Kootenai River

Little Blackfoot River

Madison River

Missouri River

Ruby River

Smith River

Sun River

Thompson River

Yaak River

Yellowstone River

Warm Springs

*This list is for informational use and does not include all rivers or stream flow data locations found in Montana. This information reflects data found on the USGS National Water Data Website. Some of the data shown here may be inaccurate, outdated, or missing. Always use good judgement and wear proper safety gear when heading out on the water.