Stanford Treeathlon
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Stanford Treeathlon 2026 : Overview
The Stanford Treeathlon 2026 is scheduled for Saturday, February 14, 2026. The event is hosted by the Stanford University Triathlon Team and takes place in San Mateo, California. The race combines swim, bike, and run legs over standard sprint distances.
Race format and categories
The triathlon consists of:
- 750 m open-water swim
- 20 km bike
- 5 km run
There are two separate races on the same day: a draft-legal event for collegiate and elite athletes and a non-draft legal classic Treeathlon. Each race uses binary wave start categories labeled men's and women's; the organizers state they will accommodate all participants regardless of gender identity. Event categories listed include collegiate athlete, age-group athlete, paratriathlete, and male, female, and mixed team relays.
Location, eligibility, and registration status
The venue address is 1901 J Hart Clinton Dr., San Mateo, CA 94401. Participants must be at least 16 years old on race day. The race listing notes that registration is temporarily closed while some details are finalized and that registered entries already on file have been recorded. Visit the organization's website for the most recent information.
