Mission Bay, San Diego CA
Sunday, October 12th, 2025
Join us at the birthplace of the sport for the XTERRA WETSUITS Mission Bay Triathlon! In 1974, the first Mission Bay Triathlon was as a run-bike-swim-run event on Fiesta Island by the San Diego Track Club.
FREE Triathlon Clinics and Workout Groups to get you prepared and connect you to the Triathlon Community - Click here for Weekly Workouts.
Benefiting Life Sports Foundation
All Distances take place on Sunday, October 12, 2025.
Event Timeline:
Location: Road Runner Sports - 5553 Copley Drive, San Diego, CA 92111
Times Open: 3pm-6pm
Please arrive early and allow time to walk or ride from parking lots to transition area. Please see parking map on our website.
For a fee of $40 - your race numbers, swim cap, timing chip, and t-shirt will be ready for your pick-up on race morning. Pre-race check in is not mandatory, you will check-in on race morning at the VIP check-in table. Pick-up is from 5:45 am-6:45 am. VIP athletes have reserved bike racks with their names in the transition area. Entries must be received by October 6th. NO EXCEPTIONS!
Triathlon & Duathlon Age Divisions (M/F):
Purchase a wetsuit from our official wetsuit sponsor, XTERRA WETSUITS! Special San Diego Triathlon Series discount! Wetsuits 60% off! Check them out HERE! Use code: R-KOZ at Checkout.
Bike rentals are available from our bike shop sponsor Moment Bicycles.
The race course and timeline can be changed at the discretion of the race organization. All distances are approximate by GPS measurements. The race can be altered, postponed or cancelled with no refunds due to weather, natural disturbances, police activity, acts of terrorism and threats of terrorism.
Refund Policy: Due to the number of race transfer requests and cancellations that occur in the weeks prior to a race we have the following policy that is in accordance with USAT Policy. Refunds will NOT be issued after a registration has taken place. Considerable effort goes into producing an event and funds are expended and applied in good faith based on a registration. If you would like to change your registration from one distance to another, you
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