The Course

The Mammoth Half Marathon carries runners over a breathtaking, scenic course through California’s picturesque High Sierra mountains and operates under permit on the Inyo National Forest**. The route starts nearly 9,000 ft above sea level at Horseshoe Lake and finishes in downtown Mammoth Lakes (~7,800 ft). Since our inaugural race in 2013, we have added a scenic loop around Lake Mary and brand-new Waterford bridge, making our world-class course even better!

Perks & Pricing


  • Finisher’s Medal

  • Scenic Course

  • Personalized Bib

  • Long-sleeved Technical Shirt


  • JAN 6 - FEB 8
    • FEB 9 - APR 4
      • EXPO

        *The Mammoth Half Marathon is limited to 1,500 participants. Processing & handling is calculated at checkout and includes a $5 Community Support fee.


        Half Marathon

        “Like” us on Facebook to see all of our perks as they’re announced!

        RUN + SKI – coming soon!

        Save on both the 2019 Mammoth Half and an adult lift ticket to Mammoth Mountain with our new Run + Ski package. Includes one Mammoth Mountain adult lift pass for the 2018/2019 season (blackout dates apply) and one half marathon entry for the Mammoth Half Marathon on June 23, 2019. Mammoth Mountain is set to remain open until July 4 so there’s plenty of time to get your stoke on!

        ...it's time to REGISTER.
        ...it's time to TRAIN.
        ...it's time to RACE!


        • Personalize your bib (by May 22)



        • Purchase upgrades during registration

          • VIP upgrade includes pre- and post-race receptions and restrooms
          • Race day packet pick-up upgrade
          • The San Diego – Mammoth Challenge upgrade


        • Reach your goal

          • Complete 13.1 miles
          • See our pace table to estimate your finish time
          • Mammoth Track Club & Rock Runner Pace Team supports goal finish times of: 1:45, 2:00, 2:15, 2:30
          • Course time limit: 4:00hr (18min/mi pace)

        • Download a training plan

          • Advanced


        Sunday, June 28, 2020


        • Pick up your Race Packet at the Mountain Center

        • Start/Finish in Mammoth Lakes

          • Start at Horseshoe Lake and finish in downtown Mammoth Lakes.  Complimentary race day shuttles for participants to/from the start and finish are provided from all our preferred Hotels

        • Share Results and Spectator Guide

        • Awards

          • Overall, Masters overall, top 3 in each age group

        • Celebrate Mammoth Lakes – and your finish

          • Special offers at participating businesses in downtown Mammoth Lakes

        *All times are approximate.

        Helpful Tips

        • Review the course maps, altitude and elevation profile listed above
        • Hydrate well before and during the race
        • Train with the provided course nutrition so that nothing is new to you on race day
        • Review our Safety Tips and Race Day Checklist and High Altitude Tips

        Course Nutrition


        On-Course Ultima flavor: Blue Raspberry


        On-Course Energy Flavors: Strawberry, Chocolate, Raspberry, Lemonade

        **In accordance with Federal law and U.S. Department of Agriculture (USDA) civil rights regulations and policies, this institution is prohibited from discriminating on the basis of race, color, national origin, sex, age, disability, and reprisal or retaliation for prior civil rights activity.  (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means of communication for program information (e.g., Braille, large print, audiotape, American Sign Language, etc.) should contact the responsible State or local Agency that administers the program or USDA’s TARGET Center at (202) 720-2600 (voice and TTY) or contact USDA through the Federal Relay Service at (800) 877-8339.  Additionally, program information is also available in languages other than English. To file a complaint alleging discrimination, complete the USDA Program Discrimination Complaint Form, AD-3027, found online at http://www.ascr.usda.gov/complaint_filing_cust.html, or at any USDA office or write a letter addressed to USDA and provided in the letter all of the information requested in the form.  To request a copy of the complaint form, call (866) 632-9992.  Submit your completed form or letter to USDA by: (a) mail: U.S. Department of Agriculture Office of the Assistant Secretary for Civil Rights, 1400 Independence Avenue, SW, Washington, D.C. 20250-9410; (b) fax: (202) 690-7442; or (c) email: program.intake@usda.gov. USDA is an equal opportunity provider, employer, and lender.

        Race weekend parking and driving directions are included in our final instructions.

        The final instructions link will be available the Monday before race week and will also be posted to our Facebook page.

        Drop Us A Note

        Have a question you can't find the answer to? We'd love to help!

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