Rosaryville State Park

7805 West Marlton Avenue
Upper Marlboro, MD 20735

301-856-9656

Rosaryville is a 982 acre day-use park and the location of the historic Mount Airy Mansion. Miles of trails for hiking, biking and equestrians are available for day use. 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.

Please use "Flag This Place" to alert us about content that is inappropriate or needs immediate attention. Nothing you submit will be shared with other site visitors.
Explore the free AARP HomeFit Guide

AARP Events for Berlin

View All AARP Events

image of two AARP membership cards
Only $12 your first year with Automatic Renewal
  • Immediate access to your member benefits
  • Discounts on travel and everyday savings
  • Subscription to AARP The Magazine
  • FREE second membership
Join AARP
Already a member? Renew or Print Card

Contact AARP
New York