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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
58
season
Sep 2026 – Jul 2027
countries
19
next up
Lost Soul Ultra 100 km

Next up

Course map for Lost Soul Ultra 100 km
100K
Today
Sep 11, 2026
Lost Soul Ultra 100 km
Lethbridge, AB, CA7,870 ft
Course map for Wildstrubel Wild 110 Crans-Montana
100K
Today
Sep 11, 2026
Wildstrubel Wild 110 Crans-Montana
Crans-Montana, Valais, CH20,890 ft
Course map for The Rut Mountain Runs Trifecta
VK + 30K + 50K
Today
Sep 11, 2026
The Rut Mountain Runs Trifecta
Big Sky, MT, US
Course map for Malaysia Ultra-Trail MY100
100K
Tomorrow
Sep 12, 2026
Malaysia Ultra-Trail MY100
Taiping, Perak, MY16,440 ft
Course map for Pirin Ultra 68K
100K
Tomorrow
Sep 12, 2026
Pirin Ultra 68K
Bansko, BG13,730 ft
Course map for Surf Coast Century 100km
100K
Tomorrow
Sep 12, 2026
Surf Coast Century 100km
Anglesea, VIC, AU6,470 ft
Course map for Paraty Brazil PTR 108
100K
7 days away
Sep 18, 2026
Paraty Brazil PTR 108
Paraty, RJ, BR15,540 ft
58 races · September 2026 – July 2027
SEPTEMBER 202613 RACES
FRI
11
SEP
Lost Soul Ultra 100 km
Lethbridge, AB, CA7,870 ft
FRI
11
SEP
Wildstrubel Wild 110 Crans-Montana
Crans-Montana, Valais, CH20,890 ft
FRI
11
SEP
The Rut Mountain Runs Trifecta
Big Sky, MT, US
SAT
12
SEP
Malaysia Ultra-Trail MY100
Taiping, Perak, MY16,440 ft
SAT
12
SEP
Pirin Ultra 68K
Bansko, BG13,730 ft
SAT
12
SEP
Surf Coast Century 100km
Anglesea, VIC, AU6,470 ft
FRI
18
SEP
Paraty Brazil PTR 108
Paraty, RJ, BR15,540 ft
SAT
19
SEP
Grindstone Running Festival 100K
Mount Solon, VA, US10,360 ft
SAT
19
SEP
Plain 100K
Leavenworth, WA, US27,140 ft
SAT
26
SEP
Roubion - Nice - 100K
Nice, Provence-Alpes-Côte d'Azur, FR15,360 ft
SAT
26
SEP
Sangre de Cristo Trail Festival 100K
Westcliffe, CO, US10,740 ft
SAT
26
SEP
7 Valleys Ultra
Keswick, Cumbria, GB13,060 ft
SAT
26
SEP
Sawatch 50/50
Buena Vista, CO, US
OCTOBER 202611 RACES
SAT
3
OCT
Cuyamaca 100K Endurance Run
Descanso, CA, US8,800 ft
SAT
3
OCT
The Bear Chase 100K
Lakewood, CO, US3,990 ft
SAT
10
OCT
Javornícka stovka
Čadca, SK13,220 ft
SAT
10
OCT
Kodiak Ultra Marathons 100K
Big Bear Lake, CA, US8,690 ft
FRI
16
OCT
Festival des Templiers Endurance Trail
Millau, FR14,070 ft
SAT
17
OCT
Taupo Ultramarathon 100km Team Relay
Taupō, NZ4,390 ft
SAT
17
OCT
Taupo Ultramarathon 100km Run
Taupō, NZ4,390 ft
SAT
17
OCT
Cappadocia Ultra-Trail CUT
Ürgüp, Nevşehir, TR12,240 ft
SAT
17
OCT
Blackall100 100km
Mapleton, QLD, AU9,780 ft
SAT
31
OCT
Javelina Jundred 100K
Fountain Hills, AZ, US3,960 ft
SAT
31
OCT
Mallorca CPS - Camins de Pedra Seca
Sóller, Illes Balears, ES12,570 ft
NOVEMBER 20262 RACES
SAT
14
NOV
K-WAY SkyRun 100
Lady Grey, Eastern Cape, ZA13,720 ft
SAT
21
NOV
RMB Ultra-Trail Cape Town UT100
Cape Town, Western Cape, ZA13,470 ft

Frequently asked questions

How many 100K trail races are there?

Trailrace lists 58 upcoming 100K trail races (Sep 2026 – Jul 2027), sorted soonest first.

What is the next 100K race?

The next is Lost Soul Ultra 100 km on September 11, 2026 in Lethbridge, AB, CA.

Which countries host 100K trail races?

These 100K trail races span 19 countries. Use the region filter to narrow the list to a specific country.

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