St. Mary's River State Park is a Maryland state park located in California, Maryland. The park consists of two sites: one encompasses the 250acre St. Mary's Lake; the second covers and is largely undeveloped. The park features picnicking, a boat launch, boating (electric motor only), flat water canoeing, fishing, and hunting. A 7.5mi trail around St. Mary's Lake is used for hiking, horseback riding, and mountain biking.
