Flagstaff Lake, Reservoir in Somerset and Franklin Counties, Maine, United States.
The 20,300-acre Flagstaff Lake stretches across the Dead River Valley, reaching depths of 48 feet with the Bigelow Mountain Range as its background.
The Long Falls Dam construction in 1950 transformed the natural lake into a reservoir, submerging three existing towns beneath its waters.
The lake bears the name of a former village where Benedict Arnold's expedition planted a flagpole during their march through Maine's wilderness.
Visitors can explore the lake through kayaking, fishing for landlocked salmon, or hiking along its undeveloped shoreline throughout multiple seasons.
During periods of low water levels, the foundations and streets of submerged towns become visible, revealing the remnants of past communities.
Location: Maine
Elevation above the sea: 349 m
GPS coordinates: 45.19410,-70.31460
Latest update: May 10, 2025 20:58
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