Take The Challenge

The “San Diego – Mammoth Challenge”

Finish both the San Diego Half Marathon on March 9, 2014, and the Mammoth Half Marathon on June 22, 2014, 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 Fee
San Diego – Mammoth Challenge
If you ran the 2014 San Diego Half Marathon, you can purchase the Mammoth Half Marathon for only  $90 in our online store!  If you did not participate in the San Diego Half Marathon, you can register for Mammoth by visiting:  Mammoth Half Marathon

How to Register
To register for the “San Diego – Mammoth Challenge”, you must run the  2014 San Diego Half Marathon. Visit our online store and purchase the item entitled:  ”Yes, I want to Take the San Diego – Mammoth Challenge!”

If you did not participate in the San Diego Half Marathon, you can register for Mammoth by visiting:  Mammoth Half Marathon

If you have already registered for the Challenge,  you can confirm that you have been entered into our Mammoth registration by using our 2014 Mammoth Bib# Lookup.

Note:  Finishers of the “San Diego – Mammoth Challenge” will receive their 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.

Train Like An Olympian

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!

Discover Mammoth

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.