The Mannford boat ramp in Oklahoma is a concrete boat ramp that provides access to the Keystone Lake. According to the latest information available, the boat ramp is approximately 20 feet wide, which should allow for easy launching and retrieval of watercraft. The Keystone Lake is a reservoir located on the Arkansas and Cimarron Rivers in northeastern Oklahoma, and it is known for its excellent fishing, boating, and water recreation opportunities. The lake is open to a wide range of watercraft, including powerboats, sailboats, kayaks, canoes, and jet skis. However, it is important to note that certain restrictions and regulations may apply to different types of watercraft and activities on the lake, so it is always best to consult the latest information regarding permitted watercraft and activities before heading out on the water.