Hidden Valley Park 
4872 Klasen Rd
Madison, OH 44057
440-358-7275
http://www.lakemetroparks.com/parks/hidden-valley.shtml
Park: Fish, Hike, Picnic, Playground, Walk, Water Sports
Amenities: 147 Acres, Accessible Facilities, Picnic Area with Grills, Picnic Shelter with Fireplace, Drinking Water, Restrooms, Hiking Trails, Playground, Fishing, Sledding Hill, Ball/Game Fields, Pay Phone, and Canoe Access.