TAKE THE CHALLENGE

Finishers of both the 2019 San Diego Half Marathon and 2019 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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Prices increase at midnight tonight! Register today at mammothhalfmarathon.com and experience the scenic course on June 28, 2020. Both the Mammoth Half Marathon and Mammoth 5K are walker-friendly. Make it a summer getaway for your whole crew (well-behaved pups allowed on the Mammoth 5K!). #mammothhalf

Prices increase at midnight tonight! Register today at mammothhalfmarathon.com and experience the scenic course on June 28, 2020. Both the Mammoth Half Marathon and Mammoth 5K are walker-friendly. Make it a summer getaway for your whole crew (well-behaved pups allowed on the Mammoth 5K!). #mammothhalf ... See MoreSee Less

11.02.19

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Carly Horn great shot of you!

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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