The Oklahoma Greenway Trail boat ramp in Oklahoma City is a concrete boat ramp that provides access to the Oklahoma River. According to the latest information available, the boat ramp is 24 feet wide and can accommodate a variety of watercraft, including canoes, kayaks, and small motorboats. The Oklahoma River is a 22-mile long waterway that runs through Oklahoma City and is used for recreational activities such as fishing, boating, and kayaking. The river is also home to competitive rowing and kayaking events. The Oklahoma Greenway Trail boat ramp is located near the intersection of SW 15th Street and S Agnew Avenue, and is one of several access points for the Oklahoma River. Get driving directions.