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Mountain Ultra Trail by UTMB
168km168100km10058km5843km4325km2511.9km11.9

MUT 100

UTMB World Series
100.0km·4717m+
May 29, 05:00 AM
George,
South Africa
utmb·source

Race Pace Calculator · GPX Analyzer · Trail Finder

Other races: South Africa

  • Ultra-Trail Cape Town · UT100November 21, 2026 · 99.1km · 5000m+
  • Ultra-Trail Cape Town · UT100November 20, 2027 · 99.1km · 5000m+
  • Comrades · Comrades MarathonJune 13, 2027 · 89.0km
  • Ultra-Trail Cape Town · PT55 Peninsula TraverseNovember 20, 2026 · 56.7km · 2644m+
  • Ultra-Trail Cape Town · PT55 Peninsula TraverseNovember 19, 2027 · 56.7km · 2644m+
  • Two oceans Marathon · UltraApril 4, 2027 · 56.0km

Read

  • How to Taper for a Marathon, Half Marathon or Ultra
  • Types of Runs and What Each Workout Actually Trains
  • Hill Training for Trail Runners: Train the Descents

100K trail race calendar

MUT 100 · Race profile

Distance
100km
Gain
4717m+
Max
981m
Min
107m

About MUT 100

MUT 100 is the 100km ultra trail at Mountain Ultra Trail by UTMB 2027 (George, South Africa). The race starts on May 29, 2027 at 05:00 AM. It starts in George.

Race strategy

Hold a steady pace and save energy for every section.

  • 894m 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 49.8km, then run your race pace, and go all out on the final descent from 91.9km.
  • Start · 0.0km–1.3km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
  • Settle in · 1.3km–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–49.8km · Descent of 429m averaging 16%, descent of 372m averaging 8%, descent of 894m 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 · 49.8km–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 47m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 37% of the distance is uphill, 35% downhill and 28% flat. The longest climb runs 6.1km at an average 6.5% grade (401m of vertical). The longest descent runs 13.0km at an average 6.9% grade (894m of vertical). The steepest climb averages 34.4% over 0.5km. The steepest descent drops at 35.2% over 0.2km. Surface: 73% trail and 17% smooth.

Poles

Poles bring little benefit here: only about 14.1km of pole-friendly terrain.

Quad damage

Quad damage risk is moderate (index 48 of 100), with 60% 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 49.8km, then run your race pace, and go all out on the final descent from 91.9km.
  • #2 · 13.2–15.9 km · 429 m D−, -16.0% · 83.2 km ahead → control
  • #3 · 20.1–24.5 km · 372 m D−, -8.5% · 74.6 km ahead → control
  • #1 · 36.9–49.8 km · 894 m D−, -6.9% · 49.3 km ahead → control
  • 80.6–82.4 km · 362 m D−, -20.1% · 16.7 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.

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

Other distances of Mountain Ultra Trail by UTMB 2027MUT Miler (168km)·MUT 60 (58.0km)·MUT Marathon (43.0km)·MUT Challenge (25.0km)·MUT Lite (11.9km)

Other editions of MUT 1002026·2025

Official websitemut.utmb.world