Sunday, July 21
Seward Park

Seafair Triathlon Info

The Seafair Triathlon, Seattle’s ONLY triathlon, offers participants multiple disciplines on a flat, fast and picturesque triathlon course in the heart of Seattle. Taking place on the shores of Lake Washington at Seward Park, in the shadows of downtown Seattle, this race is a must do for all triathletes in the northwest.

The event offers participants a unique opportunity to participate in a sprint distance triathlon or super sprint distance in an urban setting. Swimming in a protected cove, riding on closed roadways and running through Seward Park, this is the Pacific Northwest’s premier triathlon.

Offering a Kids Triathlon as well, there is a distance for everyone in the family at the Seafair Triathlon! Join us in 2019 at the Seafair Triathlon with over 1,400 health enthusiasts taking part in the event.


Race Weekend Schedule

Saturday, July 20

What: Pre-Race Packet Pickup & Body Marking

Where: Seward Park

Time: 12:30pm – 4:30pm

Sunday, July 21 – RACE DAY!

5:15 a.m. – Transition Zone Opens
7:00 a.m. – Sprint Triathlon Course Start
7:15 a.m. – Sprint Duathlon Course Start
7:30 a.m. – Sprint Relay Course Start

7:45 a.m. – Super Sprint Course Start
10:30 a.m. – Kids Short Course Start
11 a.m.  – Kids Long Course Start
Awards Ceremony to follow each wave finish 

Included with your race entry:
  • 2019 Seafair Triathlon participant shirt
  • Event Finisher Medal
  • Timing Chip, Swim Cap
  • Personalized Race Bib

Transition Area
The transition area will be open and supervised starting at 5:15 a.m. on Sunday, July 21. For the safety of all participants, only registered participants will be allowed in the transition area. Participants may leave their personal belongings in this secure area. Please rack your bike on your designated bike rack, which is determined by your race number. Athletes can rack their bikes the morning of the race, or a day early on Saturday, July 20 for a $15 fee. Nobody without a race bib and body marking will be allowed in the transition zone on race day.

Race Distances

Sprint Distance Triathlon – 0.5 mile swim, 14-mile bike ride, 5K run

Sprint Duathlon – 14-mile bike ride, 5K Run

Sprint Distance Relays – Same as the sprint course

Super Sprint Distance Triathlon – 0.25 mile swim, 12-mile bike ride, 5K run

Kids Long Course – 100-yard swim, 2-mile bike ride, 1-mile run

Kids Short Course – 50-yard swim, 1-mile bike ride, 0.5 – .75 mile run

*All participants in the relay category and duathlon category will also receive finisher medals after the race

*OLYMPIC DISTANCE – Due to very high rising costs, there will not be an olympic distance offered in 2019

Triathlon Course Information

Swim Course – Counter-clockwise swim through Andrew’s Cove (1 full triangular lap for sprint, 1 smaller triangular lap for super sprint) at the north side of Seward Park. The cove is protected from wind and boats. There will be lifeguards onsite if a rest is needed or to help you safely finish the swim

Bike Course – Participants will ride north along Lake Washington Blvd until the turn-around point (Madison Park for sprint, McGilvra for olympic) where athletes will ride south back to Seward Park on Lake Washington Blvd. All roads are 100% closed to traffic and monitored by Seattle PD. Enjoy the breathtaking views of Lake Washington, Bellevue skyline and Mt. Rainier on your ride.

Run Course – All participants will complete one loop, north to south along the paved running trails and roadways within Seward Park. An on-course water station will be located at the beginning of the run discipline and at the halfway point of the loop course.

Course Maps


Event Parking
Parking is not permitted at Seward Park for the Expo or the Triathlon. Participants may park in the surrounding neighborhoods. Please be respectful of the residents who share their neighborhood with us and abide by all parking restrictions, keeping noise to a minimum. There will be a “Drop Off – Load/Unload Zone” on Juneau St. directly in front of the park entrance. *Please note: Lake Washington Blvd. closes to traffic at 6 a.m. To access the park via car or on foot please use Juneau St. Do not leave your car on Juneau for any period of time or you will be at risk of being towed by Seattle PD.


Prize Money and Awards
Prize money will be awarded to the top three individuals (male and female) competing in the elite wave of the Sprint Distance Triathlon. Only individuals competing in the elite wave will be eligible to win prize money. Elite athletes are not eligible to win age group awards. There will be no elite category or prize money for individuals competing in the super sprint triathlon.

1st Place – $200 plus free entry to 2020
2nd Place – $100 plus free entry to 2020
3rd Place – Free entry for 2020 Seafair Triathlon

All other awards will not be announced. Winners will receive awards following the race via email

To be placed in the elite wave, please send us your past three finish times, race distances and overall placing to