(Oklahoma)
Keystone State Park is an Oklahoma state park near Sand Springs, Tulsa County, Oklahoma, in the United States. Located on Keystone Lake, the park covers 714 acres (289 ha) and provides recreational opportunities for fishing, swimming, water skiing and boating. Cabins are available to rent. Keystone State Park is on State Highway 151 near Mannford. (Ref: https://en.wikipedia.org/wiki/Keystone_State_Park_(Oklahoma))