Stanford Treeathlon 2026

If you are a team athlete affiliated with USA Triathlon WCCTC, please enter your team name when you register. If you are not affiliated please select "other" or "open" when you register. You must be 16 years old or older by race day to register for this race.

You must be 16 years old or older by race day to register for this race.

You must be 16 years old or older by race day to register for this race.

Relay for 3 male participants in the Classic race (one swimmer, one cyclist, one runner). You must be 16 years old or older by race day to register for this race.

Relay for 3 female participants in the Classic race (one swimmer, one cyclist, one runner). You must be 16 years old or older by race day to register for this race.

Relay for 3 participants of any gender in the Classic race (one swimmer, one cyclist, one runner). You must be 16 years old or older by race day to register for this race.