Photos: Amazing Images from the 2015 Ultra-Trail du Mont-Blanc

The 13th annual Ultra-Trail du Mont-Blanc trail running race was held Aug. 28-30 in Chamonix, France. The 104-mile race sends runners around the the Mont Blanc massif, the largest mountain range in Western Europe, on a through-the-night voyage through parts of France, Italy and Switzerland. Runners tackle more than 30,000 feet of vertical gain and go up and over 10 mountains before reaching the finish line back in Chamonix. In all, more than 7,250 runners tackled one of the five races during UTMB week that ranged in length between 50K and 300K.

RELATED: Americans Run Strong at UTMB, CCC in Chamonix

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