6th October 2021; Etape Mystere ;  Marathon des Sables, stage 4 of  a six-day, 251 km ultramarathon, which is approximately the distance of six regular marathons. The longest single stage is 82 km long. This multiday race is held every year in southern Morocco, in the Sahara Desert. The start for the Elite runners of stage 4, 'Longest Day'
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