River MI

North Branch Thunder Bay River

Michigan • 45.0844, -84.1342

Reviewed mapped path Updated Dec 26, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

54 mi

86 km

Elevation

897′ → 670′

227 ft drop

Stream Order

Stream

Slope

0.08%

4.2 ft/mi

Drainage

168 mi²

435 km²

Avg Flow

132 cfs

1.0 mph velocity

Path to Mouth

1,322 mi

2,127 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 North Branch Thunder Bay River

There are 1 linked public-access records for North Branch Thunder Bay River.