St. Mary's River State Park

St. Mary's River State Park photo courtesy of St. Marys Tourism Park Reservations

Contact:​ 301-872-5688​

St. Mary's County

St. Mary's River State Park
c/o Point Lookout State Park
11175 Point Lookout Road
Scotland, MD 20687

May through September
6:00 a.m. to sunset

October through April
7:00 a.m. to sunset

Park Information

Situated at the northern end of the St. Mary's River watershed, St. Mary's River State Park is separated into two areas, Sites 1 and 2. The Site 1 area holds the 250-acre St. Mary's Lake. Located along Maryland Route 5, between Leonardtown and Great Mills, at the end of Camp Cosoma Road, the area has become a popular freshwater fishing spot. This area has been improved by a modern comfort station, picnic tables, playground, boat launch ramps and a large gravel parking lot. Leashed pets are allowed in the state park.

The day use service charge for Site 1 is credit-card only, $3/vehicle for Maryland residents. Out-of-state residents add $2. Charges are collected at the automated gate system at the entrance. Passholders (Maryland Passport, Golden Age and Universal Disability) may contact the park office at 301-872-5688 or by email ( to receive an additional swipe card that allows free entry through the automated gate system located at the Lake Area of the park.

Site 2 covers approximately 2,200 acres and is primarily undeveloped. It is a wildlands area and a managed hunting area. Parking is permitted in designated areas only. The park shows a wide range of habitats, from wooded acres and fields to swamps and small streams. With such a diversity, you can also find many different types of plant and animal species.