Register here for the DRAFT LEGAL race! Classic race registration can be found here. To request a code to sign up for draft legal, please email treeathlon@gmail.com. If you're wondering if you should race draft legal or classic, please check the FAQs on the race website.

Come and join in the fun of one of the best collegiate triathlons in Northern California. The race is a 600m open-water swim, a 20km bike, and a 5k run.  

There are two separate Treeathlon races taking place on March 3, 2024.  The Draft Legal race for Collegiate and Elite athletes will start at 8:00am.  The Classic race, a non-draft legal race, will start at 11:00 am. In each race, we have two categories of waves, men's and women's. While these wave start categories are binary, we recognize that not all people fit within that and we will accommodate all participants regardless of gender identity.

You must be 18 years old to participate in this race. Please be sure to check the race website for packet pickup information and schedule changes, and other race updates: https://www.stanfordtreeathlon.com/