California native Rory Bosio won for the second year in a row the Ultra-Trail du Mont-Blanc 100 , one of the world’s most difficult ultramarathon trail races.

The UTMB course, which winds through the mountains of France, Switzerland and Italy around Chamonix, crosses three mountain passes over 104 miles. Bosio, a pediatric intensive-care nurse from Truckee, California, completed the race in 23 hours, 20 minutes and 20 seconds.

“It was pretty hard for me this year because it was so muddy,” Bosio told Competitor.com. “I can already tell my legs are way more sore than they were last year. I always feel so tense when I am running in mud like that. Some of the downhills were super, super muddy and that just made it slower for me.”

While she came in slower than her time last year, Bosio still beat her nearest competitor by over 90 minutes.
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