Participants at UTMB race around Mont Blanc , the highest peak in Europe , and the setting for the pinnacle event of the trail running season .

PHOTOGRAPHS FRANCK ODDOUX , PHILIPP CARL RIEDL / RED BULL CONTENT POOL

Kenyan talent Patrick Kipngeno wins Red Bull Dolomitenmann , a brutal challenge that climbs 2 000 vertical metres over a stretch of just 12km .

Runners glide past the River Seine on the Paris Marathon , held in the City of Light in early April every year .