Who We Are

Who We Are

Mammoth Marathons is a group consisting of two Race Directors and multiple volunteers. Mammoth Marathons goals are to provide races that the whole family can participate in, and host running events that are unique and in new and undiscovered running venues.

Our Little Grand Canyon Marathon is featured in a new book titled The Runner’s Bucket List: ¬†200 Races to Run Before You Die. ¬†Click this link for more details.

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Check Out Our Races

Check Out Our Races

Check out the races in store for you.

We organize scenic, challenging, yet fun races for all ages and experience levels. We provide lots of race information, registration requirements, area photos, course maps and more!

Mammoth Marathons and Races

Featured Partner Races

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We’re Social


Stadiums are for spectators. We, runners, have nature and that is much better.

Upcoming Race