The Sebago Lake watershed (upper Presumpscot watershed) is more than 50 miles long, with headwaters in Bethel and the lake outlet in Standish at Sebago Lake Dam. The watershed includes all or parts of 24 towns, and covers approximately 440 square miles. The lake’s natural footprint expanded with the construction of the thirty-foot tall Sebago Lake Dam, and today the dam’s outlet is regarded as the start of the Presumpscot River. Sebago Lake is the deepest and second largest lake (after Moosehead Lake) in Maine. The lake is 12 miles long and its shoreline stretches 105 miles. It is surrounded by the towns of Casco, Naples, Raymond, Sebago, Standish and Windham. Sebago Lake is the water source for Greater Portland, 15% of Maine’s population. The lake is one of the cleanest drinking water sources in the northeastern United States. But because so much of the forest surrounding it is privately owned and subject to development pressures, the Sebago Lake watershed is vulnerable. The Crooked River contributes more surface inflow to Sebago Lake than any other tributary.
Friends of Sebago Lake
The mission of Friends of Sebago Lake (FOSL) is to promote an understanding of the interconnected harmful impacts of unnatural freshwater flows by dam regulation and to advocate for the restoration of natural freshwater seasonal water flows from inland waters to the seas.
Little Sebago Lake Association
The Little Sebago Lake Association is a Nonprofit 501(c) (3) Corporation that owns and operates Hopkins Dam. Their mission is to protect, restore, and improve our lake’s water quality and fragile ecosystem.
Loon Echo Land Trust
Loon Echo Land Trust protects land in the northern Sebago Lake region of Maine to conserve its natural resources and character for future generations.
8 Depot Street, Suite 4, Bridgton, ME 04009
Presumpscot Regional Land Trust
Presumpscot Regional Land Trust supports healthy lands, waters, wildlife, and people across the Presumpscot River watershed through conservation, water quality monitoring, education, and public access.
P.O. Box 33, Gorham ME 04038
Sebago Chapter of Trout Unlimited
Trout Unlimited’s mission is to conserve, protect and restore North America’s trout and salmon fisheries and their watersheds. The Sebago Chapter of Trout Unlimited is the largest chapter in Maine and covers southern Maine from Yarmouth to the New Hampshire border.
Sebago Lake Ecology Center (Portland Water District)
The Ecology Center is open to the public, Monday through Friday from 8:00 a.m. to 4:00 p.m.; please call ahead to confirm hours or to book a tour or presentation.
Routes 237/35 Intersection, Standish, Maine
Western Foothills Land Trust
Western Foothills Land Trust is dedicated to the conservation and protection of native ecosystems, farm and forestlands, watersheds, and scenic landscapes for the benefit of wild and human communities in western Maine.
PO Box 107, 445 Main Street. Norway, Maine 04268