Ski or mountain bike slopeside (Mammoth Mountain will be open through July 2023 for skiing.)

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Mammoth Half Marathon

August 28, 2021 - September 25, 2021


The popular Mammoth Half Marathon is back this year with a new format run by Epic Run – a flex run, where the route and swag are provided for you. Just pick your date to visit and run. Offered daily June through September with 13.1 mile, 10K or 5K routes available.

Register online now!

After registration, your shirt, bib, and other items will be mailed to you.


August 28, 2021
September 25, 2021
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Epic Run
844-EPIC RUN (374-2786)
View Organizer Website