River WI MN

Flag River

Wisconsin • 46.7911, -91.3859

Hydrography profile Updated Dec 27, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

15 mi

24 km

Elevation

999′ → 602′

397 ft drop

Stream Order

Medium River

Slope

0.51%

27.1 ft/mi

Drainage

44 mi²

115 km²

Avg Flow

46 cfs

0.8 mph velocity

Path to Mouth

1,907 mi

3,068 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 Flag River

There are 1 boat ramps, launches, and public access points on Flag River.