100K Races 2026 14 events
100 kilometres — a serious ultramarathon. Browse upcoming events worldwide.
Upcoming races
RunningIn 2 days
Thames Path Challenge
◎ London, United Kingdom▤ Sep 12-13, 2026
100 km
RunningIn 2 days
Leeds Country Way In A Day 100km
◎ City of Leeds, United Kingdom▤ Sep 12, 2026
100 km
RunningIn 9 days
Hill to Hollow 100km
◎ Tully, USA▤ Sep 19, 2026
100 km
RunningIn 10 days
Seoul 100K
◎ Seoul, South Korea▤ Sep 20, 2026
100 km
RunningIn 3 weeks
Cuyamaca 100k
◎ Julian, USA▤ Oct 3, 2026
100 km
RunningIn 6 weeks
100km del Sahara
◎ Tembaine, Tunisia, Tunisia▤ Oct 24, 2026
100 km
RunningIn 7 weeks
Sri Chinmoy Self-Transcendence 100 km, 50 km & 100 km Teams Races
◎ Christchurch, New Zealand▤ Nov 1, 2026
100 km
RunningIn 8 weeks
Mountaineer Rumble 10 Mile-50K-100K-100 Miler
◎ Blacksburg, USA▤ Nov 7, 2026
16.1 km
RunningIn 9 weeks
Looking Glass 100k
◎ Pisgah Forest, USA▤ Nov 14, 2026
100 km
RunningIn 3 months
Freight Train 100k/50k
◎ Farmville, USA▤ Dec 5, 2026
100 km
RunningIn 5 months
Sean OBrien 100K/50M/50K/26.2/30K
◎ Calabasas, USA▤ Jan 30, 2027
100 km
RunningIn 6 months
Sycamore Canyon 100k / 50K / Half
◎ Poway, USA▤ Feb 27, 2027
100 km
RunningIn 7 months
Stillhouse 100K
◎ Soddy Daisy, USA▤ Apr 17, 2027
100 km
TriathlonIn 8 months
ATW Centurion 100KM Triathlon Box End
◎ Box End Lakes,Box End Rd, Bedford MK43 8RN, United Kingdom▤ May 23, 2027
100 km
