River WI MI

Oconomowoc River - Little Friess Lake

Wisconsin • 43.2423, -88.2841

Hydrography profile Updated Dec 27, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

41 mi

65 km

Elevation

964′ → 835′

129 ft drop

Stream Order

Medium River

Slope

0.06%

3.2 ft/mi

Drainage

95 mi²

246 km²

Avg Flow

74 cfs

0.9 mph velocity

Path to Mouth

1,756 mi

2,826 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 Oconomowoc River - Little Friess Lake

There are 2 boat ramps, launches, and public access points on Oconomowoc River - Little Friess Lake.