Based on the latest information available, the Old State Highway 51 Sand Springs boat ramp in Oklahoma is a public access boat ramp. It is located at latitude 36.13875961 and longitude -96.23820496. The boat ramp provides access to Keystone Lake, which is a large reservoir on the Arkansas River. The ramp is approximately 16 feet wide, which is sufficient for most types of watercraft, including small fishing boats, kayaks, canoes, and pontoons.

Keystone Lake is managed by the U.S. Army Corps of Engineers, and a variety of watercraft are permitted on the lake. Fishing boats, pontoons, sailboats, and personal watercraft such as Jet Skis are allowed, as long as they comply with all state and federal regulations. Additionally, the lake is popular for water skiing and wakeboarding, and there are several marinas and campgrounds located nearby.

It is always recommended to check with local authorities, such as the U.S. Army Corps of Engineers, for any updates or changes to regulations or access to the boat ramp.