Guilford Lake and Ohio's other canal feeder lakes were the first areas to be dedicated as Ohio state parks in 1949. There is a camping area with 42 non-electric sites located in an old pine plantation on the northeast corner of the lake, providing shady and sunny areas. A play area, fishing dock, drinking water, showers, flush toilets, picnic tables and fire rings are provided. Boating Boats with motors up to ten horsepower are permitted on the lake. Launching ramps and seasonal dock rentals are available.
Boat rentals are available from a privately-owned marina on the south side of the lake.
A half-mile hiking trail skirts the scenic lakeshore and provides opportunities for exercise and wildlife observation. Fishing Good catches of bass, bluegill, crappie and channel catfish can be taken at Guilford Lake. A valid Ohio fishing license is required. Picnicking Shaded picnic areas with tables and grills are located at various points around the lake. Swimming A 600-foot public swimming beach is located on the northwest side of the lake.