River ID

South Fork Madison River

Idaho • 44.7192, -111.2214

Hydrography profile Updated Feb 1, 2026

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USGS and NOAA data is for informational purposes. Source notes

Length

23 mi

38 km

Elevation

7,648′ → 6,537′

1,112 ft drop

Stream Order

Medium River

Slope

0.90%

47.3 ft/mi

Drainage

80 mi²

206 km²

Avg Flow

-- cfs

1.1 mph velocity

Classification

Tributary

Mid-reach

Elevation Profile

Water Quality

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

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Data from USGS & NOAA for informational purposes only. Read source and safety notes

Rain Radar