Greenbrier is a multi-use park providing many kinds of recreation. The Appalachian Trail passes through the park. The 42-acre man-made lake and beach draw many visitors who enjoy swimming, canoeing, hiking, picnicking, fishing and hunting. As with most of Maryland's State Parks, a park map is available at the park office.

Located in the Appalachian Mountains, this state park offers many recreational opportunities. The man-made freshwater lake offers swimming, sunbathing, boating and fishing opportunities. There are also hiking trails which meander through a variety of wildlife habitats and afford a view of the area's geological history. Picnic tables and grills and playgrounds are available in the day-use area.