TAKE THE CHALLENGE

Participants of both the 2020 San Diego Half Marathon and 2020 Mammoth Half Marathon will receive an extra-large “San Diego-Mammoth Challenge” spinner medal.  San Diego boasts over 70 miles of coastline, an average daily temperature of 70.5 ºF (21 ºC) and world-class attractions such as SeaWorld, San Diego Zoo, Safari Park, and Legoland California!

DEENA KASTOR’S 2018 MAMMOTH HALF

Watch how Olympian and Mammoth Lakes local, Deena Kastor, cruised to victory at the 2018 Mammoth Half Marathon.

EXPERIENCE THE RACE

LATEST NEWS

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The Mammoth Half Marathon carries runners over a breathtaking scenic course through Californias picturesque High Sierra mountains. Runner perks include a long-sleeve technical running shirt, finishers medal, shuttle service to the start line, and more! Experience the scenic course for yourself - both the Half Marathon and 5K are walker-friendly. Visit mammothhalfmarathon.com to learn more!
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Last call to take the San Diego - Mammoth Challenge! Run both the San Diego Half Marathon and the Mammoth Half Marathon in 2020 and take home our extra-large spinning Challenge medal!

The Mammoth Half Marathon carries runners over a breathtaking scenic course through California's picturesque High Sierra mountains. Runner perks include a long-sleeve technical running shirt, finisher's medal, shuttle service to the start line, and more! Experience the scenic course for yourself - both the Half Marathon and 5K are walker-friendly. Visit mammothhalfmarathon.com to learn more!
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Last call to take the San Diego - Mammoth Challenge! Run both the San Diego Half Marathon and the Mammoth Half Marathon in 2020 and take home our extra-large spinning Challenge medal!
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03.09.20

Comment on Facebook

Mammoth Half Marathon is such a beautiful course, one of my favorites!

Ilonka Betjes and I from the Netherlands will run sunday San Diego and in june this race. How cool is that. 🏃🏻🇺🇸🤣👍🏻

Gage Curran !!!!!

OUR UNIQUE VISION

As a nonprofit 501(c)(3), the Mammoth Half Marathon benefits charity partners and community service projects, with 100% of our net proceeds going to local causes.

2019 SUPPORTING SPONSORS

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VISIT BEAUTIFUL MAMMOTH LAKES

Elite runners, including current and former Olympians, take advantage of training in Mammoth’s picturesque scenery and high altitude to prepare for their season.  Follow in the footsteps of world-class elite runners and discover the town of Mammoth Lakes, located in the heart of the California’s Eastern Sierra Mountains!  Mammoth Lakes is home to one of the country’s top ski and snowboarding resorts in the winter and serves as an equally beautiful summer vacation.  Visit Travel & Hotels to book a room at one of our preferred hotels.

RUN + SKI – coming soon!

We offer bundled savings to run + ski if the slopes are still open …so stay tuned!

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COUNTDOWN TO RACE DAY

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