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Results & Live Tracking — IRONMAN 70.3 Knokke-Heist 2026
On Sunday, September 6, 2026, Knokke-Heist hosts Belgium's only IRONMAN 70.3 triathlon, a World Championship qualifier.
1.9 km swim starting in the Netherlands, flat 90 km bike, flat 21.1 km beachfront run. Live tracking on RTRT.
Live Tracking & Results → 🌐 Official Website →IRONMAN 70.3 Knokke-Heist takes place on Sunday, September 6, 2026, in Knokke-Heist, a coastal town in West Flanders on the Belgian North Sea shore, right by the Dutch border. It is the only IRONMAN 70.3 race held in Belgium and serves as an official qualifying race for the IRONMAN 70.3 World Championship. Registration for 2026 is sold out.
The race has a quirky claim to fame: it doesn't actually start in the country where it's held. The 1.9 km swim takes place in the Damsche Vaart canal, starting from the town of Sluis — across the border in the Netherlands. The 90 km bike leg is a flat, fast loop that also runs partly through Dutch territory before crossing back into Belgium, weaving across the Flemish countryside and coast with minimal elevation change and a steady, engaging rhythm. The 21.1 km run finishes the day with a flat course along Knokke-Heist's beachfront.
Race-day conditions typically see water temperatures around 19°C and air temperatures between 18-24°C. Knokke-Heist itself is known for its long white sand beaches, dunes, and the nearby Zwin nature reserve, home to salt marshes, polders, ponds, and reed beds rich in birdlife, alongside hotels, restaurants, and art galleries. The town is easily reached from Brussels Airport and Belgium's rail network. Live tracking and results: RTRT.
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Course Highlights
| Landmark | Discipline | Notes |
|---|---|---|
| Sluis, Netherlands SWIM START | 1.9 km swim | Damsche Vaart canal, unusual cross-border start |
| Flemish countryside & coast BIKE | 90 km, flat loop | Partly in Dutch territory, minimal elevation change |
| Knokke-Heist beachfront RUN & FINISH | 21.1 km, flat | Coastal town finish, Belgium's only 70.3 |
| Zwin nature reserve NEARBY | Off-course landmark | Salt marshes, polders, birdlife near the venue |
| WORLD CHAMPIONSHIP QUALIFIER Knokke-Heist, Belgium · RTRT Live Tracking | ||
Frequently Asked Questions About IRONMAN 70.3 Knokke-Heist 2026
When is IRONMAN 70.3 Knokke-Heist 2026?
IRONMAN 70.3 Knokke-Heist 2026 takes place on Sunday, September 6, 2026, in Knokke-Heist, Belgium.
Where can I find IRONMAN 70.3 Knokke-Heist 2026 results?
Live tracking and results are available on RTRT (track.rtrt.me).
Does the IRONMAN 70.3 Knokke-Heist swim really start in another country?
Yes. Unusually, the 1.9 km swim starts in the Netherlands, in the Damsche Vaart canal near the town of Sluis, before the bike leg crosses back into Belgium and finishes in Knokke-Heist.
Is IRONMAN 70.3 Knokke-Heist the only IRONMAN 70.3 race in Belgium?
Yes, it is the only IRONMAN 70.3 event held in Belgium and serves as a qualifying race for the IRONMAN 70.3 World Championship. Registration for the 2026 edition is sold out.