Along with Burton Island and Woods Island state parks, Knight Island, acquired by the State in 1990, is one of three neighboring island parks in Lake Champlain's 'inland sea”. This 185-acre island is a mile long and nearly a half mile wide. The park includes all but 10+ acres of private land on the island's southern tip. When on Knight Island, please respect the rights of the park neighbor and keep off the southern end.

The island was farmed historically then was uninhabited for many years. It was a privately operated primitive campground through the 1980s. The owner lived year-round on the island and began a timber management program to supplement the camping operation. Under state ownership, remote area camping has been continued on seven sites dotted around the island. Land management activities are those which will keep the island unique and unspoiled.