Cook Conservation Area and Lancaster State Forest include about 800 acres owned by Lancaster Conservation Commission, located 1.5 miles from MA-117 on the west side of Lunenburg Road, MA-70. This connects to the Chapman/Goodale land that extends into Leominster. Parking is available. A six-mile trail runs along the North Branch of the Nashua and returns by cart paths.

The AllTrails website has a description and map of a hike at Cook Conservation Area.