St. Mary's River State Park

Situated at the northern end of the St. Mary's River Kayaking at St. Mary's River lakewatershed, 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. Check out a map of the area.

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. Several species of fish are common to the lake including largemouth bass, chain pickerel, crappie, bluegill and sunfish. The lake has been designated a trophy bass lake and as such, special fishing regulations may be in effect. Fishermen should check bulletin boards or contact park personnel for details. Please note that electric motors only are allowed on the lake.

A 7.5 mile trail circles the lake, allowing the area to be fished from shore or by boat (electric motor only). The trail is regularly used for hiking, biking and horseback riding. The Maryland Park Service does not rent horses, and only provides the trails as a means of recreation. There is waterfowl hunting at designated sites only (accessible by boat). Permit (free) and reservation are required. You can make reservations by calling 301-743-5161 between 8 a.m. and 12 p.m. The Site 1 area has been improved by a modern comfort station, picnic tables, playground, boat launch ramps and a large, gravel parking lot. Picnicking is permitted but tables are limited. Pets are allowed in the state park.

Site 2 covers approximately 2,200 acres and is primarily undeveloped. It is a wildlands area and a managed hunting area. Small game such as rabbit and squirrel, as well as white-tailed deer are found here. Hunting with a firearm is permitted. You may hunt with bow and arrow during the regular archery season for deer. For specific regulations and seasons, check the Guide to Hunting and Trapping in Maryland. Parking is permitted in designated areas only.

The day use service charge is $3/vehicle year-round. Out-of-state residents add $2.


From as far back as 3000 B.C., evidence indicates that Native Americans lived in the Southern Maryland area. Several different tribes occupied the area at different times, some of which include the Piscataway-Conoy, Algonquins, and the war-like Susquehannocks. Many of the names they used for their villages and rivers are still used today. Items left by these people such as arrowheads, axe heads and pottery can still be found in the fields along the stream banks of the St. Mary's River.


Boat launch, fishing, flat water canoeing, hiking, horseback, and mountain biking trails hunting, picnicking, boating--electric motor only.

Volunteer Opportunities:

Volunteer opportunities abound at St. Mary's River State Park. Volunteers can help with special projects, site maintenance, and trail maintenance. Trail maintenance projects require individuals who are skilled, and comfortable working independently. Staff led large trail projects welcome the unskilled volunteer. For more information on becoming a volunteer at St. Mary's River, call Point Lookout State Park at 301-872-5688 and ask for the volunteer coordinator.

Access for All:

St. Mary's River State Park offers an accessible bathroom, and seasonal boat launching facility. For additional accessible amenities in Maryland State Forests and Parks, visit the Accessibility For All section of this website.​​

Veterans Conservation Corps


This park is supported by Maryland’s Veterans Conservation Corps (VCC), a program modeled after the Maryland Conservation Corps. The VCC works with the Maryland Park Service and the Department of Natural Resources on conservation projects in areas such as recreation enhancement, park operations, wetland restoration, facility improvements, and trail maintenance and construction. Corps Members are trained in relevant, enriching, and marketable skills such as Emergency Medical Responder, chain saw safety, hazardous tree removal, Search and Rescue, trail construction, Environmental Education/Interpretation, and invasive species removal.

Maryland's Veterans Conservation Corps program helps empower veterans during their transition from military service to civilian life by leveraging their unique background and service ethic with the therapeutic value of the outdoors and professional skills development, while they address pressing conservation needs on public lands. For more information about this program, contact the park:

Online Services

Contact the Park Service

  • To Report Violations of Park Rules: 1-800-825-7275 (Park Watch) or 1-410-260-8888 (Communications Center)
  • General Information: 1-800-830-3974 (Annapolis Office)
  • Reservations: 1-888-432-2267
  • Email Us
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