Kanopolis State ParkReprinted from the Wichita Eagle   KANOPOLIS STATE PARK — Six horseback riders crossed a tallgrass savannah, then had hilltop views of a sprawling lake. The horses were stirrup deep as they crossed a clear stream in a valley that looked straight from a classic John Wayne western, framed by towering rim rock — with a pair of sizable caves — and scarred where buffalo hooves had cut into rock for centuries. Eventually the riders traversed dense woodlands and toured a rugged canyon of giant, rose-colored boulders.