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River MT

Clark Fork

Montana • 46.3977, -112.7425
Hydrography profile Updated Feb 1, 2026
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USGS and NOAA data is for informational purposes. Source notes
Length
346 mi
557 km
Elevation
4,798′ → 2,065′
2,733 ft drop
Stream Order
8
Major River
Slope
0.15%
7.9 ft/mi
Drainage
20,392 mi²
52,815 km²
Avg Flow
-- cfs
2.8 mph velocity
Classification
Tributary
Mid-reach
Elevation Profile
Water Quality

Data from EPA Water Quality Portal (USGS, EPA, state agencies).

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Water Level Gauges on Clark Fork

There are 9 USGS water level monitoring stations on Clark Fork providing real-time flow and stage data.

Access Sites on Clark Fork

There are 8 boat ramps, launches, and public access points on Clark Fork.