The Audi Power of Four Race Series is a premier endurance event utilizing the challenging and unique terrain of the four peaks of The Aspen Snowmass Mountains – Aspen Mountain, Aspen Highlands, Buttermilk, and Snowmass. The great thing about Aspen is that you most always find the local ski bums give the pros in town a run for their money. Designed for both the elite and recreational athlete, it is safe to say the competition is fierce. The event offers a 50K Ultra (August 1) and a 25k race (August 2) The 50k beginning at the base of Aspen Mountain and ending at Snowmass Base Village includes a combination of single track and fire roads with epic views throughout. With elevation climbs of just over 12,000 feet and starting at 8,000 feet, not to mention the four peaks, this is an event that is as mentally challenging as the physical but with views and camaraderie worth the pain.