Tri Info
Seafair Triathlon Info
The Seafair Triathlon, offers participants multiple disciplines on a flat, fast and picturesque triathlon course only 10 minutes from Downtown Seattle at Seattle’s Seward Park. Seattle’s ONLY Triathlon will once again take over the shores of Lake Washington this summer and Seward Park is the perfect backdrop for this flat, fast and picturesque triathlon course in the shadows of Downtown Seattle. The event offers participants a unique opportunity to participate in a sprint distance triathlon or super sprint distance in an urban setting. Swimming in warm, calm waters, riding in protected roadways and running through Seward Park, this is the Pacific Northwest’s premier triathlon. Offering a Kids Tri as well, there is a distance for everyone in the family at the Seafair Triathlon! Join us in 2025 at the Seafair Triathlon with over 1,500 health enthusiasts taking part in the event. I can’t make it to the race, how do I defer to next year?-
- Go to: www.runsignup.com
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- Click the circle silhouette in the upper right hand corner
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- Log in to your account
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- Click Profile
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- Find the Seafair Triathlon in your upcoming events tab
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- Select “Manage Registration”
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- At the top, either select “Transfer to someone else” or “Defer Registration”
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- Follow the prompts on screen
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- *If you’ve chosen to defer, we will automatically enter you in next year’s race and email you a confirmation when it happens (after registration is open). You can always defer again if needed
RACE DAY INFO
Race Weekend Schedule Saturday, July 19 What: Saturday Pre-Race Packet Pickup & Body Marking Where: Seward Park 5900 Lake Washington Blvd, Seattle, WA 98118 Time: 12:30pm – 4:30pm Sunday, July 20 – RACE DAY! 5:30a.m. – Transition Zone Opens 6:00a.m. – Race Day LATE packet pickup & body marking begins 6:00a.m. – Bike Mechanics Area Opens 7:00a.m. – Sprint Triathlon Course Start 7:27a.m. – Sprint Relay Team Swim Start 7:55a.m. – Duathlon Bike Start 8:07a.m. – Super Sprint Course Start 10:30a.m. – Kids Long Course Start 11:00a.m. – Kids Short Course Start We plan to do an awards ceremony recognizing the top three overall in the male/female categories for the elites only. All others will be awarded an electronic downloadable finisher certificate after the event.Included with your race entry:
- Seafair Triathlon participant shirt
- Event Finisher Medal (Adults & Kids!)
- FREE downloadable participant photos (average of 4+ per participant)
- Timing Chip, Swim Cap
- Unique Race Bib
Transition Area
The transition area will be open and supervised starting at 5:30 a.m. on Sunday, July 20. 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, Saturday bike racking will not be allowed in 2025. Nobody without a race bib and body marking will be allowed in the transition zone on race day. Bike mechanics will also be located in the transition zone and available to make quick adjustments to your bike before the event.
Swim Course – Counter-clockwise swim in the protected cove of Andrews Bay at Seward Park in Lake Washington (1 full triangular lap for sprint, 1 smaller triangular lap for super sprint) 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 – Sprint Distance, Super Sprint, Relay Teams and Duathlon participants will ride north through along Lake Washington Blvd through multiple waterfront neighborhoods including Leshci, Madrona and others. All participants will follow LWB, Lakeside Ave, connecting to McGilvra. On McGilvra, all participants will turn around and follow the same course south before returning to Seward Park. With only one hill, this is a fast course for all cyclists!
Run Course – All participants will complete one loop around Seward Park from the swim beach to the south side of Seward Park. Midway through your run, participants will run out and back to the upper loop of Seward Park before finishing at the south parking area where the post run celebration waits! The run course is the same for all Sprint, Super Sprint and Duathlon participants.
⬇️ SEAFAIR TRIATHLON – 2025 SWIM WAVE START TIMES BELOW ⬇️
Race Distances
Sprint Distance Triathlon – 0.5 mile swim, 20KM (12.4 mile) bike ride, 5 Kilometer run Sprint Duathlon – 20KM (12.4 mile) bike ride, 5 Kilometer Run Sprint Distance Relays – Same as the sprint course Super Sprint Distance Triathlon – 0.25 mile swim, 20KM (12.4 mile) bike ride, 5 Kilometer 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 (swim in water kids can touch in) *All team participants in the relay category and individual duathlon category will also receive finisher medals after the raceTriathlon Course Map & Information
Swim Course – Counter-clockwise swim in the protected cove of Andrews Bay at Seward Park in Lake Washington (1 full triangular lap for sprint, 1 smaller triangular lap for super sprint) 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 – Sprint Distance, Super Sprint, Relay Teams and Duathlon participants will ride north through along Lake Washington Blvd through multiple waterfront neighborhoods including Leshci, Madrona and others. All participants will follow LWB, Lakeside Ave, connecting to McGilvra. On McGilvra, all participants will turn around and follow the same course south before returning to Seward Park. With only one hill, this is a fast course for all cyclists!
Run Course – All participants will complete one loop around Seward Park from the swim beach to the south side of Seward Park. Midway through your run, participants will run out and back to the upper loop of Seward Park before finishing at the south parking area where the post run celebration waits! The run course is the same for all Sprint, Super Sprint and Duathlon participants.
Event Parking
There is no parking within Seward Park. All participants are advised to park in the Seward Park neighborhoods and bike to the transition zone. Reminder – Lake Washington Blvd will be closed so please take alternate routes.
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 2026 event
2nd Place – $100 plus free entry to 2026 event
3rd Place – Free entry for 2026 Seafair Triathlon
Age Group Awards and Event Finishers will be recognized by online race results and will have the opportunity to download electronic finisher certificates and age group certificates.
To be placed in the elite wave, please send us your past three finish times, race distances and overall placing to [email protected]
