The stream Hyner Run carves a small valley from the surrounding steep mountains, creating a cozy, quiet place for a family adventure. The park is entirely surrounded by Sproul State Forest. Calll or go online for camping reservations. Rustic sites and cabins available. The park is the eastern trailhead for the 50-mile Donut Hole Trail system, a moderate to rugged trail for the backpackers. Shorter hikes are available close to the park on state forest lands. Hyner Run is excellent trout fishing. Brook and brown trout are stocked annually and native brook inhabit its upper reaches. The nearby right branch of Young Womans Creek has a fly fishing area. The large swimming pool is open from Memorial Day weekend to Labor Day. The park is a trailhead for the 64-mile Hyner Snowmobile Trail and provides plowed parking and unloading areas and unheated restrooms.