Lake Sunapee is located within Sullivan County and Merrimack County in western New Hampshire. It is the fifth-largest lake located entirely in New Hampshire. The lake is approximately 8.1 miles long and from 0.5 to 2.5 miles wide, covering 6.5 square miles, with a maximum depth of 105 feet.
Open Water Swimming
At the age of 76, Harry Briggs swam 16 km across Lake Sunapee as a fundraiser.