The Cool Hand Luke Gravel Grinder. By popular demand we are starting at a local barn again in Leavenworth. 16940 Dakota Drive, Leavenworth, Kansas. This year’s ride will feature a huge bonfire at the start, a 25, 50 and 100 mile ride, two SAGS, prizes for all categories in the 100 mile ride, and a food truck with beverages at the ride’s end. Registration is available at www.usacycling.org. No license is required to register/participate.