While visiting Rosaryville, Maryland, you’ll definitely want to check out Rosaryville State Park. This lovely park is perfect for a day outside, and allows for excellent hiking and biking opportunities. Enjoy the trails and some fun time outdoors! Rosaryville is also a short 16 miles outside of Washington, D.C., which allows for easy access to the capitol. Spend some time outdoors and enjoy your visit to Rosaryville, Maryland.