115 Mile Gravel Road, Ultra Endurance, Cycling EventJoin AZ Gravel Rides and the Town of Chino Valley as we host Arizona's most unique one day cycling event on May 4, 2019. The course is a 115 mile-long out and back from Chino, Arizona to the Williams (Gateway to the Grand Canyon) area and back through the Prescott and Kaibab National Forests. There is approximately a 70/30 split between gravel and paved roads. Elevations along the course vary from 4000 ft to 7200 ft.