Camp Wellfleet is a former United States military training camp. It occupies about of land located along the Atlantic Ocean in the Town of Wellfleet, Massachusetts. The 548th Antiaircraft Artillery Battalion (75mm Gun) used the Camp for a firing range from 1954-1956. The majority of the site (1,688.8 acres) is owned and maintained by the National Park Service, as the administrator of the Cape Cod National Seashore. The Town of Wellfleet owns a portion (49.2 acres) of the site. It was officially opened on March 19, 1943.