Fairfax County has an extensive system of county parks of all sizes. The Hillsdale community has easy access to a very attractive recreational area across Guinea Road. Lake Royal is a small U-shaped man-made lake with park and field areas. There is a 2-plus mile trail around the perimeter of the lake, and it’s a pleasant walk, mostly flat with one steep area. The trail was built and is still maintained by a local Boy Scout troop. A walk from Hillsdale around the lake and back again is about 3 miles long. There is a playground area with picnic tables and benches, and a baseball diamond, basketball court, and football field.
The lake has a resident population of Canada geese and the occasional blue heron and egret, beavers, and fish. See recent developments related to Royal Lake.