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MUT - Mountain Ultra Trail by UTMB
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MUT 100

UTMB World Series
98.0km·4717m+
May 30
George,
South Africa
utmb·source

Race Pace Calculator · GPX Analyzer · Trail Finder

Other races: South Africa

Read

  • Types of Runs and What Each Workout Actually Trains
  • Hill Training for Trail Runners: Train the Descents
  • Downhill Running Muscle Damage: Why Descents Wreck Quads

100K trail race calendar

MUT 100 · Race profile

Distance
98.0km
Gain
4717m+
FlatKM
140.0
Max
981m
Min
107m

About MUT 100

MUT 100 is the 98.0km ultra trail at MUT - Mountain Ultra Trail by UTMB 2026 (George, South Africa). The race starts on May 30, 2026.

Race strategy

Hold a steady pace and save energy for every section.

  • 888m descent. Go easy, save your quads.
  • Steep 29% wall. Control your pace and stay focused.
  • Long race. Control your HR and effort. Early mistakes cost the most.
  • Ease into the early runnable section, save your quads on the descents until 49.9km, then run your race pace, and go all out on the final descent from 91.9km.
  • Start · 0.0km–1.4km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
  • Settle in · 1.4km–13.2km · Climb of 702m, high point 985m. Ease in: hold back more than feels necessary. The race is still ahead. Climb by heart rate or breathing, not pace. Running pays off here: run wherever you can.
  • Work · 13.2km–49.9km · Descent of 420m averaging 15%, descent of 369m averaging 8%, descent of 888m averaging 7%. Plus 2 more climbs. This is where the race is built: steady, solid effort. Climb by heart rate or breathing, not pace. This descent is hard on the legs: short steps, stay in control, poles if you have them. Running pays off here: run wherever you can. Hike the steepest pitches.
  • Fade · 49.9km–91.9km · Plus 3 more climbs and 2 descents. Your energy fades, and that's normal: hold a steady effort and stop counting the miles. Climb by heart rate or breathing, not pace. Running pays off here: run wherever you can. Hike the steepest pitches. Your heart rate drifts down on its own: don't chase your early-race numbers, go by feel.
  • Home · 91.9km–99.1km · Descent of 466m averaging 6%. No heroics: settle back into your own effort and hold it to the line. Long descent: keep it even and let go only near the end.

Course

The course climbs 4717m+. With 48m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 36% of the distance is uphill, 36% downhill and 28% flat. The longest climb runs 6.1km at an average 6.6% grade (401m of vertical). The longest descent runs 13.0km at an average 6.8% grade (888m of vertical). The steepest climb averages 33.4% over 0.4km. The steepest descent drops at 35.2% over 0.2km. Surface: 73% trail and 17% smooth. Flat-equivalent effort: 140.0 FlatKM.

Poles

Poles bring little benefit here: only about 13.6km of pole-friendly terrain.

Quad damage

Quad damage risk is moderate (index 47 of 100), with 59% of the load in the first half: 3 descents deserve a plan and a couple of downhill sessions before race day.

  • Ease into the early runnable section, save your quads on the descents until 49.9km, then run your race pace, and go all out on the final descent from 91.9km.
  • #2 · 13.2–16.0 km · 420 m D−, -15.1% · 83.1 km ahead → control
  • #3 · 20.2–24.5 km · 369 m D−, -8.4% · 74.6 km ahead → control
  • #1 · 36.9–49.9 km · 888 m D−, -6.8% · 49.3 km ahead → control
  • 80.6–82.4 km · 361 m D−, -20.3% · 16.8 km ahead → your pace
  • 91.9–99.1 km · 466 m D−, -6.4% · 0.0 km ahead → even, let go at the end
  • Plus 1 more notable descent not listed: your pace.

Weather

On race day, start temperatures have historically ranged from 12°C to 17°C, with around 13°C at the highest point; the chance of precipitation is about 23%. Heavy rain of 10.0mm or more falls on about 3% of days around this date.

Results

106 finishers completed the 2026 edition. Men's winner: Daniel Claassen (South Africa) in 10:29:17. Women's winner: Kerry-Ann Marshall (South Africa) in 13:00:19.

This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for MUT 100.

Other distances of MUT - Mountain Ultra Trail by UTMB 2026MUT Miler (168km)·MUT 60 (58.0km)·MUT Marathon (43.0km)·MUT Challenge (25.0km)·MUT Lite (12.0km)

Other editions of MUT 1002025

Official websitemountainultratrail.utmb.world