Audi Power of Four Trail Run

August 5-6, 2017

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This world-class trail running race spans all four Aspen Snowmass mountains on a mix of singletrack and dirt roads. It offers participants a variety of course options: the Vertical K (12,178' gain), 10K, 25K (4,918' gain) and the challenging 50 K, which starts at Aspen mountain and finishes in Snowmass Base Village.


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US Sky Runner Series

The Audi Power of Four Trail Races are part of the overall series for the Altra US Skyrunner Series, specifically in the 50K Ultra and Vertical K distances. Points are awarded to top finishes. Giveaways from Altra, Salomon, La Sportiva, Mas Korima and Dyrmax are available for runners and spectators via social media. Follow @usskyrunning on Twitter and the /USSkyrunning FB page.