The Leadville Trail 100 Run is one of the most storied ultramarathons in the world. Set in the rugged Colorado Rockies, this 100-mile out-and-back race starts at 10,200 feet and climbs to 12,600 feet, challenging runners with roughly 16,000 feet of elevation gain. The course features steep climbs, high-altitude passes, and technical trails, culminating in the iconic Hope Pass. Known as the “Race Across the Sky,” this event attracts the most determined athletes who aim to earn the coveted silver and gold belt buckles.