The 25 mile ski mountaineering race traces the historic, early 1800s, mail route out of Leadville, Colorado.

Power of Four skimo rando race in Aspen is the most brutal and fun contest in North America, check out our 2016 report.

Power of Four ski mountaineering skimo race 2016 promises exciting spectation or participation, with world class athletes in ski touring fast mode.

Big Sky Shedhorn Skimo Race celebrates the grandeur of Lone Mountain and challenges skier ability and endurance in one of the toughest ski mountaineering races in America.

Audi Power of Four ski mountaineering race 2015, held along with Aspen Uphill Festival, report and opinion by Lou Dawson.

Power of 4 skimo rando racing at Aspen, 2015 race report for this ski touring contest.