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100 Mile Races in Arizona

As of October 6, 2026, Crewable lists 5 upcoming 100 mile races in Arizona from October 2026 to April 2027. The next is Javelina Jundred on October 31 in McDowell. Registration is open for 3. One advertises prize money.

Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites

Race calendar

October 2026

1 race

November 2026

1 race

  1. Fat Ox

    Buckeye, AZ
    48 hr100 mi+3$4,000 purse
    Open until Nov 16from $115

December 2026

1 race

  1. Across the Years

    Peoria, AZ23 ft gain
    Backyard Ultra6 days+6
    Open until Dec 20from $105

January 2027

1 race

April 2027

1 race

Quick answers

What is the next 100 mile race in Arizona?

Javelina Jundred, on Saturday, October 31, 2026, in McDowell. Distances: 100 mi, 100K, 31K.

How many 100 mile races in Arizona have open registration?

3 of the 5 list registration as open as of October 6, 2026, including Fat Ox, Across the Years and El Jefe 100.

Which 100 mile races in Arizona offer prize money?

One race advertises prize money: Fat Ox ($4,000).

What is the busiest month for 100 mile races in Arizona?

October 2026, with 1 of the 5. November 2026 follows with 1.

Cities in Arizona

Flagstaff17Phoenix5Tucson21Sedona15

Neighboring states

California12Nevada5New Mexico31Utah5

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