St. Mary's River State Park

St. Mary's River State Park is a public recreation area located in St. Mary's County, Maryland. The state park consists of two sites: one encompasses 250 acre St. Mary's Lake (an automated gate wants $3 for Marylanders, $5 for others); the second covers 2200 acre and is largely undeveloped. The park is managed by the Maryland Department of Natural Resources.

History
The state acquired land for the park's first site between 1968 and 1974, with the lake being constructed in 1975. Acquisition of the park's second site began with the purchase of 450 acres in 1968; further acquisitions occurred until 1983.

Activities and amenities
The park features fishing, non-motorized boating, canoeing, picnicking, and hunting. A 7.5 mi trail around St. Mary's Lake is used for hiking, horseback riding, and mountain biking.