Audi Power of Four Trail Run

The Audi Power of Four Race Series is a premier endurance race series utilizing the unique and amazing terrain of each of the four Aspen Snowmass mountains. Each race is designed to test the limits and skills of both elite and recreational athletes.

VERTICAL K, 10K, 25K AND 50K RACES The event’s signature race is a challenging 50K Ultra that has been named the US Skyrunner Series North American Continental Championship. It covers the four Aspen Snowmass mountains utilizing a mix of singletrack and dirt road. The event also offers a 25K race along the famed Government Trail covering Buttermilk and Snowmass mountains and a Vertical K race up Aspen Mountain that is also part of the US Skyrunner Series.