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Built on bad decisions in Boulder, CO.

MDS Ultra 100 Mile

Draft Listing
Route not available
  1. WAA (What An Adventure)
  2. 2027 Edition

40 hours non-stop across the Moroccan Sahara, on the Legendary's footsteps

Directions
Register
All trail races in Morocco→
January 10, 2027
Sunday start
Ouarzazate, Drâa-Tafilalet
Morocco
160 km
Loop Course
875 m
Elevation Gain
Open Registration
No lottery
No Service Requirement
Does not require trail or volunteer work
No Qualifier
No qualifier race required
Very Challenging
Experienced ultrarunners
Links
WebsiteInstagram
1986
Established
200
Field Size

What Makes It Great

A non-stop desert ultra launched in 2026 for the Marathon des Sables' 40th year. Runners cover about 160 km of the Moroccan Sahara in one push, with a 40-hour limit and a minimum speed of 4 km/h. The route follows parts of the classic MDS Legendary terrain and is fully marked. Gain is only about 875 m; the hard part is moving on sand for a day and a night, so gaiters are strongly advised. Runners carry all their own food. Water stations come about every 10 km, and life bases about every 30 km have hot drinks, soup, snacks and heated shelters. Runners can switch to the 100 km at a fork around km 60.

Difficulty

Advanced
7/10

Experienced ultrarunners

Night Running
Sun Exposure
Remote Terrain
Variable Weather

Race Highlights

40 hours, non-stop
One continuous push at a minimum 4 km/h, with no bivouac
Pick your distance mid-race
Choose 100 km or 100 miles at the fork around km 60
Sand, not climbing
Only about 875 m of gain, but long sections of soft sand
New for MDS at 40
Launched in 2026 to mark the Marathon des Sables' 40th year

Finish Awards

Finisher medal
Plus a finisher gift and closing ceremony

MDS Ultra 100 Mile

Ouarzazate, Drâa-Tafilalet, MoroccoJanuary 10, 2027

January 10, 2027

MDS Ultra 100 Mile is a loop trail race in Ouarzazate, Drâa-Tafilalet, Morocco, held on January 10, 2027. The course covers 160 km, climbs 875 m, and has a 40h cutoff.

DistDistance160 km
GainElevation Gain875 m
LimitCutoff40 h
Night RunningSun ExposureRemote TerrainVariable Weather

Lottery

This event uses open registration - no lottery entry required.

Qualifier

This event does not require a qualifier for entry.

Service Requirement

This race does not have a service requirement for entry.
160 km
Distance
Loop
Route
40h
Cutoff Time
875 m
Total Ascent

Course map not available

The route for this edition is not published yet.

No on-site camping available

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.

Crew Access Points

Pacer Rules

No Pacers Allowed

Crew Rules

No Crew Allowed
Weather

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.

Cold/Hypothermia Risk

Night temperatures can fall close to 0°C during the overnight section

Rapid Weather Changes

Warm sunny days, cold nights and possible rain in the same race

Gear Rules

Trekking poles allowed

Required Gear

  • Backpack big enough for all gear
  • Hydration capacity (Minimum 1.5 L)
  • Rain jacket
  • Running outfit (Top and bottom)
  • Trail running shoes
  • Second warm long-sleeve layer
  • Headlamp (With batteries and a spare battery)
  • Survival blanket (Minimum 1.40 x 2 m)
  • Whistle
  • Lighter
  • Signalling mirror
  • Metal-blade knife
  • Food for the whole race (Self-managed)
  • Sunscreen
  • Skin antiseptic
  • 10 safety pins or a bib holder
  • Cash (EUR 100)
  • Passport and identity card
  • Official MDS medical certificate (Signed by a doctor within 90 days of the start)

Recommended Gear

  • Sand gaiters (Strongly recommended: fully sandy sections)
  • Poles (Optional)
  • Fleece, gloves, beanie, thermal tights (Nights can be near 0°C)
  • Sunglasses
  • Sleeping bag (Useful to sleep at the heated life bases)
  • Toilet paper (Not supplied at aid stations)

Race Reports

MDS ULTRA : One Push, Two Distances, and a New Desert Legacy
By Ian Corless • 2026

Videos from other Marathon des Sables events

Video thumbnail: I Finished the Toughest Footrace on Earth: 260km through the Sahara Desert
I Finished the Toughest Footrace on Earth: 260km through the Sahara Desert
Marathon des Sables Legendary
Average Rob•2025

Race reports from other Marathon des Sables events

Marathon des Sables 2025: The Tale from the DesertMarathon des Sables Legendary
By Filippo Canetta (Wild Tee Stories) • 2025
MDS The Legendary 2025: Race SummaryMarathon des Sables Legendary
By Ian Corless • 2025

Reviews

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Register•January 10, 2027