Dewey Lake is a 1,100-acre lake at Jenny Wiley State Resort Park extending 18 1/2 miles. There are 22 shoreline picnic areas available for public use, tables, grills, and two shoreline camping areas (boat access only). The marina offers 153 open slips, four launching ramps and pontoon boat rental. Enjoy a scenic getaway with lakeside lodging at the Jenny Wiley State Resort Park. Dewey Lake has many facilities for visitor recreation and pleasure: biking, boating, camping, fishing, hiking, hunting, picnicking, recreational vehicles, water sports, swimming, and wildlife viewing. Launch ramps for boating enthusiasts and fishermen are located at the marina, Goble Branch Boat Launch, Stratton Branch Boat Launch, Terry Boat Launch and German Campground.

Jenny Wiley State Resort Park provides over ten miles of trails for all ability levels.

Picnic tables, grills, and playgrounds are located throughout the park. 

Jenny Wiley State Resort Park was founded as Dewey Lake State Park as on January 1, 1954, with  Dewey Lake as its centerpiece. It was renamed in the early 1950s for Virginia ”Jenny” Wiley, a pioneer woman who is remembered as a survivor of captivity by Native Americans. It became one of the resort parks in the state in 1962 with the opening of the May Lodge.