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River ME

West Branch Mattawamkeag River

Maine • 46.0123, -68.2762
Hydrography profile Updated Dec 26, 2025
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USGS and NOAA data is for informational purposes. Source notes
Length
53 mi
85 km
Elevation
864′ → 368′
495 ft drop
Stream Order
5
Medium River
Slope
0.18%
9.4 ft/mi
Drainage
370 mi²
957 km²
Avg Flow
627 cfs
1.2 mph velocity
Path to Mouth
649 mi
1,045 km to ocean
Classification
Headwater
Source Stream
Elevation Profile
Water Quality

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

EPA WQP MyWaterway
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Data from USGS & NOAA for informational purposes only. Read source and safety notes
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Access Sites on West Branch Mattawamkeag River

There are 2 boat ramps, launches, and public access points on West Branch Mattawamkeag River.