Explore the wonders of of Isle du Bois at Ray Roberts Lake State Park on walking, biking, and equestrian trails. Enjoy camping, boating, birding, and fishing. Ray Roberts Lake is a beautiful 30,000-acre lake complex complete with boat ramps, camping, fishing, a swimming beach, numerous hiking trails, equestrian trails, Dorba mountain bike trails, hotel, marina and a park store. Most of Ray Roberts Lake State Park is located in northern Denton County. The Ray Roberts Lake State Park Complex consists of two state park units (Isle du Bois and Johnson Branch), six satellite parks (Jordan Unit, Pond Creek, Pecan Creek, Buck Creek, Sanger, and Elm Fork), Wildlife Management Areas, wetlands, waterfowl sanctuaries and the 20 mile Ray Roberts Lake/Lake Lewisville Greenbelt Corridor.