Take The Challenge


The “San Diego – Mammoth Challenge”

Finish both the San Diego Half Marathon and the Mammoth Half Marathon in the same calendar year, and you will receive an additional extra-large commemorative “San Diego – Mammoth Challenge” medal! Both events are hosted by the same non-profit organization and 100% of net proceeds benefit their respective local communities & causes.


Registration & Fees

If you ran the San Diego Half Marathon on March 8, 2015, you can purchase the Mammoth Half Marathon, scheduled for June 21, 2015, for only $81 for a limited time in the San Diego Half Marathon Store!

If you did not run the San Diego Half Marathon on March 8, 2015, but would like to register for the Mammoth Half Marathon, please visit: Mammoth Half Marathon.

Note:  Finishers of the “San Diego – Mammoth Challenge” will receive their additional Challenge Medal at the Mammoth Half Marathon finish line.  Please allow a few days for your Mammoth Half Marathon bib number to be assigned.  Whether you previously purchased the challenge as an upgrade or registered for each race separately, you will automatically be entered into the Challenge and no further action is required.

Elite runners, including current and former Olympians, take advantage of training with Mammoth’s picturesque scenery and high altitude to prepare for their season. By running both half marathons, you will literally be following in the footsteps of world-class elite runners!

The Town of Mammoth Lakes is located in the heart of California’s Eastern Sierra Nevada mountain range, located 325 miles north of Los Angeles, about the same distance east of San Francisco and only about 164 miles south of Reno, NV. The town is only 45 minutes from Yosemite National Park. 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 destination. Click here to learn more about Mammoth Lakes.

Run in one of the most beautiful cities in the world! San Diego boasts over 70 miles of coastline, an average daily temperature of 70.5 degrees and world-class attractions such as SeaWorld, San Diego Zoo and Safari Park and Legoland California! Click here to learn more about San Diego.