The Audi Power of Four Series is a premier endurance sports series held in Aspen Snowmass, designed to challenge athletes across a variety of disciplines against the stunning backdrop of the Rocky Mountains. Sponsored by Audi, this series is known for its demanding courses that span all four of Aspen Snowmass’s iconic mountains: Aspen Mountain, Aspen Highlands, Buttermilk, and Snowmass. The series includes several events throughout the year, each tailored to different endurance sports. Key events include the Power of Four Ski Mountaineering Race, the Power of Four Trail Run, and the Power of Four Mountain Bike Race. Each event tests participants' stamina, skill, and perseverance as they navigate rugged terrain, significant elevation gains, and the natural beauty of the Aspen Snowmass region.

• The Power of Four Ski Mountaineering Race is one of the most challenging ski mountaineering races in North America, requiring competitors to ascend and descend all four mountains, covering approximately 24 miles with over 10,000 feet of vertical gain.
• The Power of Four Trail Run is a grueling foot race that pushes runners to their limits across technical trails, steep climbs, and high-altitude conditions, also crossing all four mountains.
• The Power of Four Mountain Bike Race tests cyclists' endurance as they traverse demanding singletrack and doubletrack trails, featuring intense climbs and fast descents over a course that covers all four peaks.

The Audi Power of Four Series attracts elite athletes from around the world as well as local enthusiasts who are drawn to the challenge and the opportunity to compete in one of the most scenic and prestigious mountain environments. Beyond the competition, the series fosters a strong sense of community and camaraderie among participants, making it a highlight of the Aspen Snowmass events calendar. For multi-sport endurance athletes looking for other events in Colorado, be sure to check out our full list of Strambecco Best in Class, trail running, gravel and mountain biking and road cycling events.