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Purchase a Mammoth Half Marathon entry on June 23, 2019 to take the San Diego-Mammoth Challenge. Enter your San Diego Half Marathon Bib # before ordering. Also available as an option within the San Diego Half Marathon registration process.

Post race shipping of your bib, shirt, medal, and qualifying legacy items to your address on file, US addresses only. Please allow 2 weeks for delivery.  Shirt sizes available:  Women’s: XS, SM, MED, L, XL; Unisex: SM, MED, XL, XXL.  Enter participant’s name or Bib # before ordering.

Purchase an upgrade to your Mammoth Half Marathon registration for the week of June 23, 2019! Hosted by Olympian and American Record Holder, Deena Kastor.  Detail are to be announced.

Details coming soon.

VIP includes private race packet pick up at Expo, free parking, pre- and post-race receptions, VIP gear check and private restrooms! Enter your Bib # before ordering.

Upgrade your 5K (3.1 miles) race to a Half Marathon (13.1 miles). Enter participant’s name or Bib # before ordering, separated by commas if ordering more than one.

Upgrade your 5K (3.1 miles) to Relay (6.22 mile). Enter each participant’s name or Bib # before ordering, separated by commas if ordering more than one.

Upgrade your Relay (6.22 mile) race to a Half Marathon (13.1 miles). Enter each participant’s name or Bib # before ordering, separated by commas if ordering more than one.

Purchase a San Diego Marathon registration for March 10, 2019 as a gift. Unsure if they will be able to make it to the race?  Virtual Runner Upgrade is also an option!

Purchasers can download the Gift Certificate HERE to give to your friend or family member.  You can print and personalize it or send a personalized digital copy.  For inquires, please email info@sdhalfmarathon.com.