At the top of the 3 lake chain, which is the Portland water supply. Long Lake is 4,867 acres.
LONG LAKE is the large lake that lies north of the Naples Causeway in the towns of Naples, Bridgton and Harrison. About 11 miles long, it is accessed via Rt. 35 from Naples to Harrison, or via Rt. 302 through Bridgton. It is about a mile wide, covering a total of 4,867 acres, with a maximum depth of 59 ft. It connects to Brandy Pond and Sebago Lake, making it popular with waterskiers and serious boaters. Activities on the Causeway in Naples include trips on the Songo River Queen paddleboat, seaplane rides, windsurfing and para-sailing. Marinas: Naples and Harrison.