Conquer Colorado's high-altitude trails in a thrilling team endurance challenge.

The Rumble at the Ranch 6 Hour MTB Relay is an exciting endurance mountain bike event held in Highlands Ranch, Colorado. Riders can choose to compete solo or in teams of two or three, relaying laps on a 7.6-mile loop of the scenic HRCA Backcountry Wilderness Area. Riders navigate fast, flowy singletrack and double-track over a 6-hour period, with a fun, social basecamp atmosphere at Mountain Vista High School. This is an accessible challenge for riders of all levels looking for team camaraderie and a high-altitude mountain biking experience.

A 7.6-mile loop with 658 feet of elevation gain per lap, featuring 65% beginner/intermediate singletrack and 35% double-track trail for easy passing.

• 6-hour relay format with solo, 2-person, or 3-person teams
• Basecamp atmosphere at Mountain Vista High School
• Course uses HRCA Backcountry Wilderness Area trails
• Typically restricted trails open for race day
• Exchange zones for seamless team transitions