100K Races in North America 2026
100 kilometres — a serious ultramarathon. Browse upcoming events in North America.
11 upcoming races
Upcoming Races
Running
Kat'cina Mosa 100K Mountain Challenge Run
Aug 8, 2026Springville, USA
Run 100 m
Running
Dirty Feet Heartbreak 100km, 50km and Relay
Aug 15, 2026Thompson-Nicola, Canada
Run 100 m
Running
100KM d’Espoir
Aug 29, 2026Mirabel, Canada
Run 100 m
Running
Hill to Hollow 100km
Sep 19, 2026Tully, USA
Run 100 m
Running
Cuyamaca 100k
Oct 3, 2026Julian, USA
Run 100 m
Running
Mountaineer Rumble 10 Mile-50K-100K-100 Miler
Nov 7, 2026Blacksburg, USA
Run 16 m
Running
Looking Glass 100k
Nov 14, 2026Pisgah Forest, USA
Run 100 m
Running
Freight Train 100k/50k
Dec 5, 2026Farmville, USA
Run 100 m
Running
Sean OBrien 100K/50M/50K/26.2/30K
Jan 30, 2027Calabasas, USA
Run 100 m
Running
Sycamore Canyon 100k / 50K / Half
Feb 27, 2027Poway, USA
Run 100 m
Running
Stillhouse 100K
Apr 17, 2027Soddy Daisy, USA
Run 100 m