Ultra-marathon runner Courtney Dauwalter, whose penchant for competing in loose-fitting clothing has sparked a trend, has completed an unprecedented hat-trick.

Ms Dauwalter won the Ultra-Trail du Mont-Blanc (UTMB) race at the start of September, adding this to wins earlier in the season at Western States 100 and Hardrock 100 events. She is the first athlete to win all-three mountain races in the same calendar year.

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