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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
30
season
Jul 2026 – Mar 2027
countries
15
next up
Beacons Way Ultra 100KM

Next up

Beacons Way Ultra 100KM
100K
2 days away
Jul 25, 2026
Beacons Way Ultra 100KM
Abergavenny, Wales, GB11,850 ft
Never Summer 100K
100K
2 days away
Jul 25, 2026
Never Summer 100K
Gould, CO, US14,830 ft
Tushars Mountain Runs 100K
100K
9 days away
Aug 1, 2026
Tushars Mountain Runs 100K
Beaver, UT, US15,570 ft
Swiss Alps 100 100KM
100K
2 weeks away
Aug 7, 2026
Swiss Alps 100 100KM
Fiesch, VS, CH20,510 ft
Fat Dog 100K
100K
2 weeks away
Aug 8, 2026
Fat Dog 100K
Keremeos, BC, CA14,000 ft
Squamish 50/50
50K + 50M
3 weeks away
Aug 15, 2026
Squamish 50/50
Squamish, British Columbia, CA19,690 ft
Telluride Mountain Run 65 Mile
100K
4 weeks away
Aug 22, 2026
Telluride Mountain Run 65 Mile
Telluride, CO, US22,500 ft
30 races · July 2026 – March 2027
JULY 20262 RACES
SAT
25
JUL
Beacons Way Ultra 100KM
Abergavenny, Wales, GB11,850 ft
SAT
25
JUL
Never Summer 100K
Gould, CO, US14,830 ft
AUGUST 20265 RACES
SAT
1
AUG
Tushars Mountain Runs 100K
Beaver, UT, US15,570 ft
FRI
7
AUG
Swiss Alps 100 100KM
Fiesch, VS, CH20,510 ft
SAT
8
AUG
Fat Dog 100K
Keremeos, BC, CA14,000 ft
SAT
15
AUG
Squamish 50/50
Squamish, British Columbia, CA19,690 ft
SAT
22
AUG
Telluride Mountain Run 65 Mile
Telluride, CO, US22,500 ft
SEPTEMBER 202612 RACES
FRI
4
SEP
Kerry Way Ultra Nite 101km
Killarney, Kerry, IE7,730 ft
SAT
5
SEP
Dark Divide 100K
Randle, WA, US16,590 ft
FRI
11
SEP
Wildstrubel Wild 110 Crans-Montana
Crans-Montana, Valais, CH20,790 ft
FRI
11
SEP
Lost Soul Ultra 100 km
Lethbridge, AB, CA7,870 ft
SAT
12
SEP
Malaysia Ultra-Trail MY100
Taiping, Perak, MY16,440 ft
SAT
12
SEP
Surf Coast Century 100km
Anglesea, VIC, AU6,470 ft
SAT
12
SEP
Pirin Ultra 68K
Bansko, BG14,440 ft
FRI
18
SEP
Paraty Brazil PTR 108
Paraty, RJ, BR15,300 ft
SAT
19
SEP
Plain 100K
Leavenworth, WA, US27,140 ft
SAT
26
SEP
Sawatch 50/50
Buena Vista, CO, US
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

Frequently asked questions

How many 100K trail races are there?

Trailrace lists 30 upcoming 100K trail races (Jul 2026 – Mar 2027), sorted soonest first.

What is the next 100K race?

The next is Beacons Way Ultra 100KM on July 25, 2026 in Abergavenny, Wales, GB.

Which countries host 100K trail races?

These 100K trail races span 15 countries. Use the region filter to narrow the list to a specific country.

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