Rosaryville State Park

Mount Airy Mansion in Rosaryville State Park

Reservations

1-888-432-2267

Prince George's County

Rosaryville State Park
7805 West Marlton Avenue
Upper Marlboro, MD 20772​
Contact: 301-888-1410​

Hours: Park is Open 8 a.m. to sunset. All vehicles must exit the park before the gate closes at sunset. If locked in, call Park Watch at 1- 800 825 7275.

TRAIL ALERT and Project Details


Alert: ADVISORY NOTICE TEMPORARY TRAIL CLOSURE

DUE TO CONSTRUCTION ON THE UTILITY TRANSMISSION RUNNING THROUGH THE PARK, THE WESTERN SECTIONS OF THE PARK’S TRAILS ARE TEMPORARILY INACCESSIBLE AND CLOSED TO THE PUBLIC.

TRAILS RUNNING TO THE EAST OF THE TRANSMISSION LINES REMAIN OPEN.

WE APOLOGIZE FOR THIS UNSCHEDULED CLOSURE AND ASSURE YOU THAT WE ARE WORKING DILIGENTLY WITH THE ASSOCIATED UTILITY COMPANIES ON RECTIFYING THIS SITUATION. PARK MANAGEMENT


Rosaryville is a 982 acre day-use park with miles of trails for hiking, biking and equestrians. To gain access to Rosaryville State Park, make a right turn into the entrance just south of Osborne Road while traveling south on U.S. 301. The park is also the location of the historic Mount Airy Mansion. Parties, great and small, weddings, births and visits from seven presidents have left their mark, lending a wonderful feeling of expectancy to this lovely old home. 

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