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.

https://youtu.be/RbOTXlG807A

EXPERIENCE THE RACE

LATEST NEWS

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REGISTRATION NOW OPEN! Our 8th annual race returns with our signature 1,500 foot descent and lively block party finish in downtown Mammoth Lakes. Dont leave it on your bucket list - join us in the mountains in 2020! Register now at mammothhalfmarathon.com and take advantage of our introductory pricing!

REGISTRATION NOW OPEN! Our 8th annual race returns with our signature 1,500 foot descent and lively block party finish in downtown Mammoth Lakes. Don't leave it on your bucket list - join us in the mountains in 2020! Register now at mammothhalfmarathon.com and take advantage of our introductory pricing! ... See MoreSee Less

08.12.19

Comment on Facebook

Chad Coccaro - would be the perfect anniversary/goal race trip 😀

Already committed to the challenge

Best race EVER!

Paul Spencer

Laura Ruiz-Marler

Hollie Rutter wanna do this?

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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

Save on both the 2018/2019 Mammoth Mountain adult lift ticket and a 2019 Mammoth Half Marathon entry!

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COUNTDOWN TO RACE DAY

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