PRAZ-DE-FORT, SWITZERLAND - AUGUST 30: Ultra Trail du Mont Blanc competitors running on valley. The ultra-marathon takes on average 30 to 45 hours to complete. August 30, 2014 in Praz-de-Fort.

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Photo credit: © Fernando Carniel Machado / Alamy / Afripics
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Keywords: adventure, athlete, attraction, beautiful, beauty, blanc, competitor, countryside, du, europe, european, exercise, green, hills, landscape, mont, mountains, nature, participant, race, road, runner, street, sunny, swiss, switzerland, tour, tourism, tourist, trail, ultra, utmb