The lovely town of Grantham is surrounded by mountains with the North Branch of the Sugar River running through it. The town was incorporated in 1761 and is located in northeastern Sullivan County, There are ample opportunities to enjoy the outdoors in Grantham, including Grantham Town Forest and Eastman Lake. With over 320 acres of water for boating and fishing surrounded by trails for hiking, biking, and cross-country skiing, Eastman Lake is a perfect Sugar River Region getaway. In fact, Eastman is one of the best places in the state for cross-country skiing with 36 km of groomed trails.