Seattle hosts one of WA's best-kept triathlon secrets: the Seafair Triathlon. Ask around at any local tri club and you'll hear the same thing — great course, great people, and none of the big-brand fuss.
This guide is your one-stop briefing for the upcoming edition. Inside: the confirmed race date, entry fees and what's included, every distance from beginner-friendly options to longer challenges, venue and course notes, plus how to register and who to contact with questions.
Insider note: Independent local race (Fizz Events). 2026 edition held July 19, 2026 (sold out). 2027 registration opens early February; date not yet published.. What follows is everything we've been able to verify about this race — date, fees, distances, and how to register.
Race distances & course
The Seafair Triathlon offers the following events. Standard distances are listed below; check the official race page for exact course maps and any venue-specific adjustments.
| Event | Swim | Bike | Run |
|---|---|---|---|
| Sprint | 750 m | 20 km | 5 km |
| Super Sprint | 400 m | 10 km | 2.5 km |
| DuathlonRun-bike-run format; distances vary by event. | — | Varies | Run–Bike–Run |
| Youth / KidsAge-group appropriate short distances. | Short | Short | Short |
| RelaySplit the three legs between 2–3 teammates. | Team | Team | Team |
Entry fees & pricing tiers
Published entry fees: $40-$128.
findarace.com 2026 listing showed range $39.96-$127.64 across events (kids tri through sprint); organizer's official fee table not published; 2026 race sold out
Fees are a snapshot from our October 2026 research and usually rise through pricing tiers as race day approaches — registering early almost always saves money. Always confirm current pricing on the official registration page before paying.
Location & getting there
The race is based in Seattle, WA. If you're traveling in, book accommodation early — small towns hosting popular races can fill up on race weekend, and staying close to the venue makes race morning far calmer.
Arrive the day before if you can. Packet pickup, bike check-in and course briefings usually happen on-site, and a relaxed shake-out session beats a frantic morning.
How to register
Registration for the Seafair Triathlon is handled through the organizer's official channels:
- Official race website & registration
- Questions? Email the organizer at [email protected]
Tip: tiered pricing means the fee you see today may not be the fee next month. If you're committed, registering early is the simplest discount in triathlon.
Training tips for this race
- Build the swim first. Most beginners lose the most time — and confidence — in the water. Two to three short technique-focused swims per week for 8–10 weeks will transform your race.
- Practice transitions. A calm T1 and T2 can save you several minutes at sprint distance. Lay out your gear at home and rehearse the sequence twice before race week.
- Brick workouts matter. Even one short bike-to-run session per week teaches your legs what the second transition feels like — start with 30 minutes easy spinning straight into a 10-minute jog.
- Train the first run harder than you think. Duathlons open with a run, so fresh-leg speed matters — include one weekly session with a hard 2–3 km run straight into a strong bike effort.
- Get open-water practice. Pool fitness does not fully transfer: sighting, wetsuit feel, and swimming in a pack are skills. Aim for at least three open-water swims before race day.
Frequently asked questions
When is the Seafair Triathlon?
The next edition date has not been officially published yet. Check the official race website for the announcement — independent races typically confirm dates several months in advance.
Where does the Seafair Triathlon take place?
The race is held in Seattle, WA, United States. Independent local race (Fizz Events). 2026 edition held July 19, 2026 (sold out). 2027 registration opens early February; date not yet published.
What distances are offered?
The event program includes: Sprint; Super Sprint; Duathlon; Sprint Relay; Kids Triathlon. See the distance table above for standard swim/bike/run lengths per event.
How much does it cost to enter?
Published entry fees are $40-$128. findarace.com 2026 listing showed range $39.96-$127.64 across events (kids tri through sprint); organizer's official fee table not published; 2026 race sold out
How do I register for the Seafair Triathlon?
Registration is handled through the official race website. We link to it in the race facts box above — register early, as tiered pricing usually rewards early sign-ups and popular local races can sell out.
Who can I contact with questions about the race?
The organizer publishes [email protected] for race inquiries. For anything else, use the contact options on the official race website.
Training for the Seafair Triathlon? Download TriTrain on the App Store
More races to explore
Source note: Event information was checked against the official organizer page on 2026-10-05. Details and availability can change. Verify everything with the organizer before registering or traveling.