Registration is now open for the 2017 Biking Across Kansas bicycle tour across the state. The 43rd year of the largest bicycling event in Kansas history — a 513-mile ride across the state — begins on Saturday, June 10.BAK is an eight-day tour originating at the Kansas-Colorado line with a route of up to 900 bicyclists, including support staff.The bicyclists will start at the Kansas-Colorado line west of Tribune. Their overnight stops will be Dighton, WaKeeney, Plainville, Lincoln, Chapman, Rossville, and Tonganoxie.