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

The 2016 Challenge is now available for only an additional $77 for a limited time! Simply purchase the “Take the Challenge” upgrade when you register for the Mammoth Half Marathon.

If you are already registered for the San Diego Half Marathon, please visit our online Store.  You will need to enter your 2016 San Diego Half Marathon Bib number in order to purchase the upgrade.

Finishers of the “San Diego – Mammoth Challenge” will receive their additional Challenge Medal at the Mammoth Half Marathon finish line.  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.