Has the Beidleheimer Sidewinder bitten you yet? Don't miss this free race on the unpaved forest roads of Central PA's scenic Rothrock State Forest. Choose your distance, 10 kilometers or 20 kilometers! Both rolling, out-and-back courses use the traditional Leg #4 of the Tussey Mountainback 50 Mile Relay and Ultramarathon course. This event also features adjusted results for age and gender. Runners start and finish at Whipple Dam State Park. Entry is free. Donations support the Centre Region Down Syndrome Society. See you there - just for the hill of it!