River MI MN WI

Somo River

Michigan • 45.4790, -89.7944

Hydrography profile Updated Dec 27, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

30 mi

49 km

Elevation

1,644′ → 1,430′

214 ft drop

Stream Order

Medium River

Slope

0.13%

7.1 ft/mi

Drainage

130 mi²

338 km²

Avg Flow

120 cfs

1.0 mph velocity

Path to Mouth

1,973 mi

3,175 km to ocean

Classification

Headwater

Source Stream

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

Access Sites on Somo River

There are 2 boat ramps, launches, and public access points on Somo River.