Mattawamkeag River

Last Updated: April 19, 2026

Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Mattawamkeag River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Mattawamkeag River, the highest being situated at an altitude of ft, the .

The Mattawamkeag River flows 72 miles through Maine, beginning at the confluence of its east and west branches.


15-Day Long Term Forecast


       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Mattawamkeag River Near Mattawamkeag
USGS 01030500
7890 cfs 10.26 ft -1.38
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Mattawamkeag River is a river in Maine. From the confluence of its East Branch and West Branch (45°50′00″N 67°59′27″W) in Haynesville, about 10 miles (16 km) west of the Canada–United States border, the river runs 50.6 miles (81.4 km) south and west to its mouth on the Penobscot River in Mattawamkeag.