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Upcoming 100K Trail Races & Ultramarathons

Browse upcoming 100K trail races and ultramarathons from around the world. Filter by region or switch to the calendar to plan your season — each race links through to its course, elevation profile, and registration details.

races
67
season
Oct 2026 – Sep 2027
countries
23
next up
Mallorca SDT - Serra de Tramuntana

Next up

Course map for Mallorca SDT - Serra de Tramuntana
100K
4 days away
Oct 30, 2026
Mallorca SDT - Serra de Tramuntana
Sóller, Illes Balears, ES17,750 ft
Course map for Kullamannen Sprint Ultra 100 km
100K
4 days away
Oct 30, 2026
Kullamannen Sprint Ultra 100 km
Höganäs, Skåne, SE1,060 ft
Course map for Mallorca CPS - Camins de Pedra Seca
100K
5 days away
Oct 31, 2026
Mallorca CPS - Camins de Pedra Seca
Sóller, Illes Balears, ES12,570 ft
Course map for Javelina Jundred 100K
100K
5 days away
Oct 31, 2026
Javelina Jundred 100K
Fountain Hills, AZ, US3,960 ft
Course map for TransLantau 100
100K
3 weeks away
Nov 13, 2026
TransLantau 100
Mui Wo, HK13,880 ft
Course map for K-WAY SkyRun 100
100K
3 weeks away
Nov 14, 2026
K-WAY SkyRun 100
Lady Grey, Eastern Cape, ZA13,720 ft
Course map for Dinosaur Valley Endurance Run 100K
100K
4 weeks away
Nov 21, 2026
Dinosaur Valley Endurance Run 100K
Glen Rose, TX, US3,100 ft
67 races · October 2026 – September 2027
OCTOBER 20264 RACES
FRI
30
OCT
Mallorca SDT - Serra de Tramuntana
Sóller, Illes Balears, ES17,750 ft
FRI
30
OCT
Kullamannen Sprint Ultra 100 km
Höganäs, Skåne, SE1,060 ft
SAT
31
OCT
Mallorca CPS - Camins de Pedra Seca
Sóller, Illes Balears, ES12,570 ft
SAT
31
OCT
Javelina Jundred 100K
Fountain Hills, AZ, US3,960 ft
NOVEMBER 20264 RACES
FRI
13
NOV
TransLantau 100
Mui Wo, HK13,880 ft
SAT
14
NOV
K-WAY SkyRun 100
Lady Grey, Eastern Cape, ZA13,720 ft
SAT
21
NOV
Dinosaur Valley Endurance Run 100K
Glen Rose, TX, US3,100 ft
SAT
21
NOV
RMB Ultra-Trail Cape Town UT100
Cape Town, Western Cape, ZA13,470 ft
DECEMBER 20262 RACES
SAT
12
DEC
Hellgate 100K++
Natural Bridge Station, VA, US14,300 ft
SAT
19
DEC
La HOT du Père Noël
Les Herbiers, Vendée, FR8,770 ft

Frequently asked questions

How many 100K trail races are there?

Trailrace lists 67 upcoming 100K trail races (Oct 2026 – Sep 2027), sorted soonest first.

What is the next 100K race?

The next is Mallorca SDT - Serra de Tramuntana on October 30, 2026 in Sóller, Illes Balears, ES.

Which countries host 100K trail races?

These 100K trail races span 23 countries. Use the region filter to narrow the list to a specific country.

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