Park
Rosaryville State Park is a roughly 980–1,200‑acre Maryland state park in Upper Marlboro, Prince George’s County, operating as a day‑use area just south of Joint Base Andrews.
The park is known for its mix of rolling fields, mixed hardwood forest, and wetlands threaded by about 10–16 miles of multi‑use trails suited for hiking, mountain biking, and equestrian riding, including loops that are popular with regional riders and horse‑trial events.
At its heart lies the historic Mount Airy Mansion, an 18th‑century Georgian‑style manor that overlooks the park’s open fields and is available for public events and rentals. Administered by Maryland DNR, the park is open daily from sunrise to sunset, charges a small per‑vehicle or per‑person entrance fee, and offers grassy picnic areas and opportunities for wildlife and birdwatching in a semi‑rural landscape close to the Washington, D.C., suburbs.
| Address | 7805 W Marlton Ave, Upper Marlboro, MD 20772, United States |
| Elevation | 161 ft (49 m) |
| Established | 1976 |
| Phone | +1 301-856-9656 |
Rosaryville State Park is located in Maryland, United States.
Rosaryville State Park is situated in the state of Maryland.
The main phone number for the Rosaryville State Park is +1 301-856-9656.
The address of Rosaryville State Park is 7805 W Marlton Ave, Upper Marlboro, MD 20772, United States.
Yes, Rosaryville State Park is family-friendly and attracts visitors of all age groups.
Visitors usually spend a few hours to a full day exploring Rosaryville State Park.
Yes, there are several hotels and accommodations near Rosaryville State Park in Maryland.
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