Stanford Treeathlon 2026
- Date Sat 14th February 2026
- Time 1:00PM PST
- Location San Mateo, California
- Price $83.84 - $235.80
- Races 6 races
- Distances Ultra
Event summary
Participants will tackle a challenging 750m open-water swim, followed by a fast-paced 20km bike ride, and finish with a spirited 5k run. With separate waves for men and women, along with a commitment to inclusivity for all gender identities, this event is designed to celebrate the spirit of competition and camaraderie. Whether you're a seasoned triathlete or a newcomer to the sport, the Stanford Treeathlon is the perfect opportunity to push your limits and enjoy the vibrant atmosphere. Don't miss out on this exciting event – mark your calendars and stay tuned for registration updates!
Organiser's Description
Come and join in the fun of one of the best collegiate triathlons in Northern California! The race is a 750m open-water swim, a 20km bike, and a 5k run.
THERE ARE TWO SEPARATE RACES TAKING PLACE ON FEBRUARY 14TH, 2026. The Stanford Draft Legal Triathlon for Collegiate and Elite athletes will start at 10:00am. The Classic Stanford Treeathlon, a non-draft legal race, will start at 1:00 pm. 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.
_Registration for the Draft Legal event is a separate registration link._ Please check the race website for updates.
You must be 16 years old ON RACE DAY to participate in this race.
Please be sure to check the race website for packet pickup information and schedule changes. Answers to frequently asked questions (water temps, equipment, etc.) can be found here: http://www.stanfordtreeathlon.com/faqs.
Races
-
Treeathlon Collegiate Athlete
Incl. $3.84 Fee & Socks
Sat 14th February 2026 (1:00PM PST)
$83.84
OPENS 15 DECIf 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. -
Treeathlon Age Group Athlete
Incl. $6.00 Fee & Socks
Sat 14th February 2026 (2:00PM PST)
$131.00
OPENS 15 DECYou must be 16 years old or older by USAT age determination to register for this event. -
Treeathlon Paratriathlete
Incl. $6.00 Fee & Socks
Sat 14th February 2026 (2:00PM PST)
$131.00
OPENS 15 DEC -
Treeathlon Male Team Relay
Incl. $10.80 Fee & Socks
Sat 14th February 2026 (2:00PM PST)
$235.80
OPENS 15 DECRelay for 3 male participants in the Classic race (one swimmer, one cyclist, one runner) -
Treeathlon Female Team Relay
Incl. $10.80 Fee & Socks
Sat 14th February 2026 (2:00PM PST)
$235.80
OPENS 15 DECRelay for 3 female participants in the Classic race (one swimmer, one cyclist, one runner) -
Treeathlon Mixed Relay
Incl. $10.80 Fee & Socks
Sat 14th February 2026 (2:00PM PST)
$235.80
OPENS 15 DECRelay for 3 participants of any gender in the Classic race (one swimmer, one cyclist, one runner)
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1901 J Hart Clinton Dr., San Mateo, 94401, CA, United States
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Stanford Treeathlon 2026
