At the juncture of Cumberland, Gray, & Windham
Forest Lake Maine lies at the juncture of the towns of Cumberland, Gray, and Windham in Cumberland County, Maine. The lake serves as the headwaters to the Piscataqua River, which then flows into the Presumpscot River and Casco Bay. Formerly also known as Goose Pond, the lake has a surface area of 211 acres, with over 4 miles of shoreline, most of which is privately owned. The average depth is 12′ with a maximum depth recorded at 38′. As of 2014, 176 properties lie claim to lake frontage, with approximately 100 more properties adjacent to lakefront lands. The entire watershed area encompasses just under 400 properties and covers about 3 square miles (1913 acres), a small portion of which extends into Falmouth, Maine.