Flagstaff Lake is the location of a canoeing trip often done by Buzzard's Roost and Eagle's Nest. The lake is located in Somerset Franklin Counties, Maine. The North Branch Dead River and South Branch Dead River join in the lake, forming the Dead River.
Flagstaff Lake used to be smaller until the Long Falls Dam was built on the Dead River in 1956, diverting it's flow into the Keenebec River, which enlarging the lake and turning it into a reservoir used for hydroelectric power production. This submerged or partially submerged four towns—Flagstaff, Bigelow, Dead River and Carrying Place. These towns were all abandoned and dismantled before they were flooded; contrary to legend there are no buildings under the surface.
Flagstaff Lake is very shallow, only 48 feet deep at its deepest point. Landlocked salmon and brook trout can be caught in it. On the lake's South shore you can see the Bigelow Range. There are a few small islands on the lake that the trip usually stops on to camp out for the night or to stop for lunch. The trip can either begin or end at the Long Falls Dam.