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Stanford Treeathlon 2026

Sat February 14 2026
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Stanford Treeathlon 2026

Sat February 14, 2026
San Mateo, CA 94401 US Directions

Treeathlon Collegiate Athlete

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.
Open to ages 17+.
Start Time:
1:00pm PST
End Time:
5:00pm PST
Registration:
Registration Opens December 1, 2025 at 12:00am PST
Price:
$83.84 incl. $3.84 Fee
Registration:
Registration ends February 5, 2026 at 11:59pm PST

Treeathlon Age Group Athlete

You must be 16 years old or older by USAT age determination to register for this event.
Open to ages 16 - 100.
Start Time:
2:00pm PST
End Time:
5:00pm PST
Registration:
Registration Opens December 1, 2025 at 12:00am PST
Price:
$131.00 incl. $6.00 Fee
Registration:
Price increases to $141.48 after January 13, 2026 at 11:59pm PST

Treeathlon Paratriathlete

Open to ages 16 - 100.
Start Time:
2:00pm PST
End Time:
5:00pm PST
Registration:
Registration Opens December 1, 2025 at 12:00am PST
Price:
$131.00 incl. $6.00 Fee
Registration:
Price increases to $141.48 after January 13, 2026 at 11:59pm PST

Treeathlon Male Team Relay

Relay for 3 male participants in the Classic race (one swimmer, one cyclist, one runner)
Open to ages 16 - 100.
Start Time:
2:00pm PST
End Time:
5:00pm PST
Registration:
Registration Opens December 1, 2025 at 12:00am PST
Price:
$235.80 incl. $10.80 Fee
Registration:
Price increases to $251.52 after January 13, 2026 at 11:59pm PST

Treeathlon Female Team Relay

Relay for 3 female participants in the Classic race (one swimmer, one cyclist, one runner)
Open to ages 16 - 100.
Start Time:
2:00pm PST
End Time:
5:00pm PST
Registration:
Registration Opens December 1, 2025 at 12:00am PST
Price:
$235.80 incl. $10.80 Fee
Registration:
Price increases to $251.52 after January 13, 2026 at 11:59pm PST

Treeathlon Mixed Relay

Relay for 3 participants of any gender in the Classic race (one swimmer, one cyclist, one runner)
Open to ages 16 - 100.
Start Time:
2:00pm PST
End Time:
5:00pm PST
Registration:
Registration Opens December 1, 2025 at 12:00am PST
Price:
$235.80 incl. $10.80 Fee
Registration:
Price increases to $251.52 after January 13, 2026 at 11:59pm PST

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