Allagash Lake is in the North Maine Woods on the boundary of Maine range 14 townships 7 and 8. Allagash Stream flows into the northwest corner of the lake from Allagash Pond, Crescent Pond, and Mud Pond in township 9 range 15. Allagash Stream overflows the northeast corner of the lake and flows 5 miles (8.0 km) through Little Round Pond into Chamberlain Lake. Chamberlain Lake originally overflowed through Eagle Lake and Churchill Lake to the Allagash River; but was diverted through Telos Cut to the Penobscot River in the 1850s.[2] Allagash Lake provides good habitat for togue and squaretail.[3]

Allagash Lake
Allagash Lake from the summit of Allagash Mountain
Allagash Lake
Location	Piscataquis County, Maine
Coordinates	46°19′13″N 69°31′40″W[1]
Primary inflows	Allagash Stream
Primary outflows	Allagash Stream
Basin countries	United States
Max. length	4.4 mi (7.1 km)[2]
Max. width	1.6 mi (2.6 km)[2]
Surface area	4,260 acres (1,720 ha)[3]
Average depth	35 feet (11 m)[4]
Max. depth	89 feet (27 m)[3]
Water volume	151,374 acre⋅ft (186,717,000 m3)[5]
Shore length1	23.8 miles (38.3 km)[4]
Surface elevation	1,037 ft (316 m)[1]
1 Shore length is not a well-defined measure.

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