Registration
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To register for the 2025 Onion Man Triathlon, click on link below.
You may register as an Individual Age Group competitor, a 2 or 3-person relay team, or in the Athena (women at least 165 lbs.) or Clydesdale (men at least 220 lbs.) divisions. In addition, we will have an Aquabike category for those wishing to compete in only the swim and bike legs.
Your age on December 31, 2025 determines which age group you compete in.
Registration is capped at 300 participants, so register early. There is an early bird registration fee if you register before April 7.
Registration includes a free short-sleeved T-shirt. However, you must register before April 21 to be guaranteed a T-shirt. We will order a limited number of extras which will be available for those who register after April 20 at packet pick-up on a first come-first served basis. In addition, registration includes a ticket for a post-race meal and a free beer from Quirk Brewing of Walla Walla in a custom pint glass for those at least 21 years of age. At registration, you will have the option to add-on a beer for non-participants (21 years and older) with a valid drivers license for $5.00.
If you have a valid USAT membership, you need to enter it on the registration page. If not a USAT member, you will need to purchase a one-day license ($15).
There will be no refunds, transfers or deferrals of registration.
Confirmation emails are sent automatically when you register online. If you don’t receive a confirmation, email us.