Greenbelt Park, located in Greenbelt, Maryland, is managed by the United States National Park Service. The forested park lies approximately 10 miles northeast of Washington, D.C., and is situated just within the Capital Beltway. The park land was originally intended to form part of the green belt surrounding the city of Greenbelt. The southern portion was assigned to the National Park Service, thus forming the park, while another section became part of the Henry A. Wallace Beltsville Agricultural Research Center.
Recreational facilities include a 5.3 mile mile hiking and equestrian trail, several shorter nature trails, numerous campsites, and three picnic areas.
Wikipedia https://en.wikipedia.org/wiki/Greenbelt_Park
Official Website https://www.nps.gov/gree/
Coordinates 38°58'57.247" N -76°53'51.613" E