Seafair Triathlon Registration

Prices & Increase Dates:

EventThru 5/21Thru 6/11Thru 7/02Thru 7/23On 7/24 & 7/25
Sprint Triathlon$70$80$90$100$110
3-Person Sprint Relay$75$90$100$110$120
2-Person Sprint Relay$70$80$90$100$110
Sprint Duathlon$65$75$85$95$105
Super Sprint Triathlon (New in 2019!)$65$75$85$95$105
Kids Long Course Tri$25$25$30$30$35
Kids Short Course Tri$25$25$30$30$35


New in 2021 – The Seafair Triathlon will be moving to Lake Sammamish State Park. Though the venue will change, we will continue to offer participants a range of options including a sprint triathlon, team relay options, duathlon, super sprint triathlon that is perfect for beginners and kids races!

We look forward to hosting you live in person again at the 2021 Seafair Triathlon!

Registration Options

Option 1 – Register Online

Online registration for the Seafair Triathlon will be available until the start of the race on July 25th with the price increases listed above

Option 2 – Gerk’s Ski & Cycle – Pre-Race Packet Pick Up & Registration

Date: Saturday, July 24, 2021

Time: 12:00pm – 4:00pm

Location: Gerk’s Ski & Cycle

1485 11th Ave NW, Issaquah, WA 98027

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 2021.

While picking up your race packets at Gerk’s, pop inside for any last minute needs, supplies and more. Gerk’s will be offering a 20% discount on all cycling accessories for race participants!

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.

2019 Seafair Triathlon Race Results & Photos – HERE

2018 Seafair Triathlon Race Results – HERE

2018 Seafair Triathlon Photos – HERE