Seafair Triathlon Registration

Prices & Increase Dates:

EventThru 4/12Thru 5/24Thru 6/28Thru 7/197/20 & 7/21
Sprint Triathlon$85$95$105$110$125
Super Sprint Triathlon$80$90$100$105$120
3-Person Sprint Relay$95$105$115$120$135
2-Person Sprint Relay$90$100$110$115$130
Sprint Duathlon$70$80$90$95$105
Kids Long Course Tri$30$30$35$35$40
Kids Short Course Tri$30$30$35$35$40


Once again, the best triathlon in the northwest will return to the shores of Lake Washington at Seattle’s Seward Park and feature multiple adult disciplines as well as the popular Seafair Kids Tri! See you July 21.

Registration Options

Option 1 – Register Online

Online registration for the Seafair Triathlon will be available until the start of the race on July 21st with the price increases listed above. There is no in-person registration option.

Option 2 – Saturday Pre-Race Packet Pick Up & Registration

Date: Saturday, July 20, 2024

Time: 12:30pm – 4:30pm

Location: Seward Park

5900 Lake Washington Blvd, Seattle, WA 98118

Participants will pick up all necessary equipment for race day including their timing chip, discipline bibs, swim caps and will have the opportunity to get your body marking done before race day. There will be no early bike racking in 2024.

Elite Wave Entries:

To be placed in the elite wave, please send us your past three finish times (comparable distance) and overall placing to for consideration. Those placed in the elite wave WILL NOT be eligible to win age group awards, only prize money. The elite wave is for the Sprint Distance Triathlon only.

Seafair Triathlon Training Clinics & Coaching Opportunities

Seafair is excited to partner with TN Multisports to offer advanced training opportunities for the Seafair Triathlon. Whether you’re new to the triathlon world or a seasoned vet wanting to improve a specific discipline, we’ve got a training package that will help you meet your goals!

Teresa and Mark Webb of TN Multisports are USAT Level II and Level I Tri Coaches and the Tri Coach of Washington Athletic Club (WAC). For additional questions regarding the clinics, check out their website or email him at: 

For more information and how to sign up, click the links below:

Adult Clinics Include The Following:

Costs vary for each of the adult clinics, please click the individual clinic above for more information, pricing and more!

NEW! Youth Triathlete Clinic Options Include:

For more information and to register for youth clinics, please visit the TN Multisports registration site by clicking on any of the youth clinics you’re interested in. Each youth clinic is $40, or sign up for the series of 4 classes for $120 total.

2023 Seafair Triathlon Race Results & Photos – HERE

2022 Seafair Triathlon Race Results & Photos – HERE

2021 Seafair Triathlon Race Results & Photos – HERE

2019 Seafair Triathlon Race Results & Photos – HERE

2018 Seafair Triathlon Race Results – HERE & Photos HERE