Recreational vehicle parking in Upper Marlboro, Maryland

Rosaryville State Park, located at 7805 West Marlton Avenue in Upper Marlboro, Maryland, is a 1227-acre day-use park that offers miles of trails for hiking, biking, and equestrians. The park is open from 8 a.m. to sunset, and all vehicles must exit before the gate closes at sunset. If locked in, visitors can call Park Watch at 1-800-825-7275 for assistance. In addition to its outdoor activities, Rosaryville State Park is home to the historic Mount Airy Mansion. This beautiful old home has hosted parties, weddings, and visits from seven presidents, giving it a rich history and a sense of anticipation for visitors.