Keystone State Park, State park on Keystone Lake near Sand Springs, Oklahoma, United States

Keystone State Park is an outdoor recreation area along Keystone Lake near Sand Springs featuring woodlands and multiple swimming locations. The site includes three separate campgrounds, a full-service marina with boat ramps, and numerous picnic areas distributed throughout the grounds.

The park was established after construction of Keystone Dam during the 1960s created an artificial reservoir along a river. This infrastructure opened the region for recreational use and made it a destination near Tulsa.

Keystone State Park lies on Keystone Lake, a reservoir on the Arkansas River, near Sand Springs and Mannford in Tulsa County. Visitors reach it via State Highway 151, and the 714-acre grounds are used for fishing, swimming, water skiing and boating, with cabins available to rent.

Access to different areas is straightforward from the main entrance on marked roads, with comfort stations containing showers distributed among the campgrounds. The grounds work well for visitors planning to hike, fish, or operate boats since necessary facilities are located throughout the property.

Keystone State Park covers 714 acres on Keystone Lake and sits on State Highway 151 near Mannford, about 14 km from Sand Springs. Since June 15, 2020, an entrance fee has applied here as at 21 other Oklahoma state parks, charged per vehicle and waived for honorably discharged veterans and Oklahoma residents aged 62 and older with their spouses.