Arizona Trail Races & Ultramarathons
Arizona has more than a dozen trail races and ultramarathons on the calendar to check out, split into two effectively separate seasons: high-country races around Flagstaff and Prescott (5,000–7,000 feet) run September through October before winter snow, while low-desert races around Phoenix and Page run December through March to avoid summer heat. Black Canyon Ultras is the state's toughest and most prestigious, a Western States Golden Ticket race.
Masters Athlete Insights
Arizona's 16 races split cleanly into two calendars once you sort them by elevation. The high country — Flagstaff, Sedona, Prescott, all 5,000–7,000+ feet — races in September and October, before the first snow. The low desert — Phoenix, Vail, Page, Apache Junction, Sonoita — races December through March, after summer heat breaks. There's effectively no overlap, and each half needs its own prep: altitude and cool-weather layering for the fall high-country races, heat and sun management for the winter desert ones.
Whichever half of Arizona you're racing, our 16-week 50K plan is a reasonable base-building structure, and the 10-week maintenance program works well in the gap between a fall Flagstaff race and a winter desert one.
FAQ
What is the best Arizona trail race for beginners?
The Grand Canyon Trail Half Marathon & 5K in Tusayan — defined short distances at an iconic national park, though the roughly 7,000-foot South Rim elevation is worth acclimating to if you're coming from sea level.
What is the hardest trail race in Arizona?
Black Canyon Ultras — a 100K (or 50K) desert race prestigious enough to serve as a Western States 100 Golden Ticket qualifier, drawing an elite international field.
Why do Arizona's race dates cluster into two separate windows?
Elevation. High-country races around Flagstaff and Prescott (5,000–7,000+ feet) run in September and October before winter snow; low-desert races around Phoenix and Page run December through March to avoid summer heat — there's almost no overlap between the two groups.
When is trail racing season in Arizona?
Depends which Arizona: September–October in the high country, December–March in the low desert. See the elevation note above.
Are there masters (40+) divisions at Arizona trail races?
Most races on this list award age-group results in 5- or 10-year brackets rather than one "masters" category, but brackets vary by organizer — check each race's rules page before registering if it matters to you.