Keystone Keystone Lake offers both warm and cold water species, with trout stockings throughout the year. Warm water species include largemouth bass, tiger muskellunge, northern pike, black crappie, yellow perch, carp and brown bullhead catfish. Fishing is prohibited at the beach, dam breast, boat launch mooring and boat rental areas. Acid mine drainage limits the fishing quality in the stream below the breast of the dam. Keystone Lake is a Big Bass Lake and special regulations apply.
Fishing licenses are available at the park office or at nearby issuing agents.
The four-acre Kooser Lake provides good fishing for trout, bass and bluegills. No boating is permitted. Laurel Hill Anglers may test their abilities against bass, trout, catfish, suckers, bluegill, perch, crappies and sunfish in the lake 24 hours a day. Fishing is also permitted in Laurel Hill Creek and Jones Mill Run which are excellent trout streams in the park. The lake is classified as a warm water fishery with bass, pike and muskellunge as the most common game fish.