100K events in Arizona, United States
Find 100k events in Arizona, United States. Compare 6 upcoming events by date and location. Open a race guide for the course, recorded editions and official entry information where available.
Events to explore include Fat Ox Endurance Runs, Across the Years and Coldwater Hundred.
Compare running races by distance, date and surface, from shorter road events to trail races and ultras.
6 listed events · 6 with upcoming dates
Upcoming 100k events
6 matching events, earliest date first. Entry availability is shown separately.
Fat Ox Endurance Runs
USAGoodyear, Arizona
Timed endurance races and fixed-distance ultras on a short concrete loop around Estrella Mountain Regional Park’s turf picnic area.
Date listed · latest organiser confirmation not yet checked.
Across the Years
USAPeoria, Arizona
Fixed-time and fixed-distance running races on a loop at Peoria Sports Complex.
Date listed · latest organiser confirmation not yet checked.
Coldwater Hundred
USAGoodyear, Arizona
Desert trail races through the foothills of the Sierra Estrella mountains.
Date listed · latest organiser confirmation not yet checked.
Black Canyon Ultras — 100K
USASpring Valley, Arizona
Historical results collected from the UTMB Index.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Grandmaster Ultras
USAMesquite area, Arizona
Desert trail ultras for runners aged 50 and over on the Arizona Strip near Mesquite.
Date listed · latest organiser confirmation not yet checked.
Desert Peak Ultra
USAOracle, Arizona
Mountain and desert trail ultras near Oracle and Mount Lemmon.
Date listed · latest organiser confirmation not yet checked.
Race archive
Past races and previous editions
Looking back at a race? Browse the guides below for recorded editions. This section also includes events awaiting a new date and cancelled editions. Previous editions of races in the upcoming calendar are available through their race guides above.
No separate archived race guides are listed for this selection yet.
View full race archive (0) →Choosing a race in Arizona
The unfiltered upcoming calendar includes events in Goodyear (2), Mesquite area (1), Oracle (1). Use the town filter to compare locations, then check the race guide for the start venue and organiser’s travel information.
Questions about 100k events in Arizona
What should I check before a running event in Arizona?
Choose your distance, then check the route, elevation, cut-off time and entry conditions in the organiser’s race guide.
Which 100k events are coming up in Arizona, United States?
Fat Ox Endurance Runs is listed for 21 November 2026. Across the Years is listed for 28 December 2026. Coldwater Hundred is listed for 16 January 2027. Check the race guide and organiser’s latest information before making plans.
Where can I find race entry details for Arizona, United States?
Follow the link from the race guide to the organiser or entry provider, where one is available. Check the entry deadline, eligibility and current availability there. A listed race date does not necessarily mean entries are still open.
Why has a race moved out of the upcoming calendar?
Once its listed dates have passed, a race moves to the past-editions view unless another upcoming edition is recorded. Cancelled events also leave the upcoming list. The race guide stays available, and the event returns when a new date is added.