At 420 acres, Pharoah Lake is the largest lake surrounded entirely by wilderness in New York State. Located in the heart of Pharoah Lake Wilderness it is home to 6 lean-tos and 12 designated campsites. The loop trail around the like is roughly 5 miles.
https://andyarthur.org/pharoah-lake
http://www.dec.ny.gov/lands/51351.html
As seen on this 1895 topographic map.
Updated map of Pharoah Lake with campsites based on the latest data dump from the NYSDEC. As of this summer, the bridge over the outlet (southern tip) of Pharoah Lake is closed for repairs, so one must go around the lake to get to the northern shore of the lake from the Pharoah Lake Trail from Pharoah Road/Beaver Dam Road in Schroon.