Maine Camping, Maine Campground, Sebago Lake is Maine's second largest lake, covering 26 square miles in southwestern Maine. Enjoy 45 miles of boating in the SebagoLong Lake chain which will bring you from Sebago Lake, through the historic Songo Locks, to scenic Naples Causeway and beautiful Long Lake. Recreational opportunities include water sports, swimming and fishing for trout and landlocked salmon. We are only six tenths of a mile to the public boat launch.