100 km of Saharan sand in one push, with a 40-hour limit
The shorter option of the non-stop MDS Ultra in the Moroccan Sahara. Runners start with the 100-mile field, share the first ~60 km, then take the 100 km branch at the fork and finish at the same line. Gain is about 580 m, but running and walking on sand makes it far harder than the numbers suggest. The race is food self-sufficient: water stations about every 10 km, and life bases about every 30 km with hot drinks, soup and heated shelters. The time limit is 40 hours at a minimum of 4 km/h.
Some ultra experience recommended
Ouarzazate, Drâa-Tafilalet, MoroccoJanuary 10, 2027
MDS Ultra 100K is a loop trail race in Ouarzazate, Drâa-Tafilalet, Morocco, held on January 10, 2027. The course covers 100 km, climbs 580 m, and has a 40h cutoff.
The route for this edition is not published yet.
No bivouac. Runners stay 5 nights half-board at the Kasbah Hotel Xaluca in Erfoud (included in the entry). Heated shelters at the life bases about every 30 km allow a rest during the race.
January in the Moroccan Sahara is mild by day and cold by night: daytime temperatures of about 10–25°C in sun, with nights that can drop close to 0°C. The race says to plan gear for heat, cold and possible rain.
Night temperatures can fall close to 0°C during the overnight section
Warm sunny days, cold nights and possible rain in the same race
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