Coldwater Rumble

The Coldwater Rumble is a trail ultramarathon held in Goodyear, Arizona, crossing mountains and rugged backcountry terrain. Four distances are offered: 20 miles, a 32.3-mile course (52K), 52 miles, and a full 100 miles for those chasing the longest option. The race tests runners on wild desert trails, with mountainous terrain adding a serious climbing challenge to every distance. Whether you're new to trail racing and testing the 20-mile route or an experienced ultrarunner aiming for the 100-mile finish, the Coldwater Rumble offers a demanding day out in the Arizona desert mountains for runners at any stage of their ultra experience.