Upton State Forest is a state-owned, public recreation area and forest preserve primarily located in the town of Upton, Massachusetts, with smaller sections in the towns of Hopkinton and Westborough. The state forest encompasses nearly 2,800 acres (1,100 ha) of publicly accessible lands and includes the last remaining Civilian Conservation Corps (CCC) camp in Massachusetts, built in National Park Service rustic style. The CCC campground was listed on the National Register of Historic Places in 2014.