100mi events in Arizona, United States
Find 100mi 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 Route 66 UltraRun, Fat Ox Endurance Runs 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 100mi events
6 matching events, earliest date first. Entry availability is shown separately.
Route 66 UltraRun
USASeligman, Arizona
Point-to-point road ultras on Historic Route 66, finishing at Topock66. The 140-mile race starts in Seligman; the centennial 100-mile race starts in…
· Entry closed
Date listed · latest organiser confirmation not yet checked.
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.
Coldwater Hundred
USAGoodyear, Arizona
Desert trail races through the foothills of the Sierra Estrella mountains.
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.
Cocodona
USABlack Canyon City, Arizona
Point-to-point ultras across the mountains and desert of central and northern Arizona.
Date listed · latest organiser confirmation not yet checked.
Mogollon Monster
USAPine, Arizona
Mountain trail races around the Mogollon Rim.
· Status TBC
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), Black Canyon City (1), Mesquite area (1). Use the town filter to compare locations, then check the race guide for the start venue and organiser’s travel information.
Questions about 100mi 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 100mi events are coming up in Arizona, United States?
Route 66 UltraRun is listed for 14 November 2026 (entry closed). Fat Ox Endurance Runs is listed for 20 November 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.