Make history at the first IRONMAN Belgium Knokke-Heist. Race through stunning coastal landscapes and finish along the beautiful North Sea shore.
Knokke-Heist is located in the north-west region of Belgium and is the greenest municipality along the coast. Participants and visitors can experience a rich diversity of beaches, dunes, mudflats, salt marshes, polders, ponds, reed swamps, and woods, alongside luxury hotels, fine restaurants, and art galleries.
Register on or before 23 December 2026 to qualify for Flex90 benefits, including free deferral, fee-free transfer, and partial refund options if your plans change.
The swim is a 3.8 km one-loop river swim in Damsche Vaart (Sluis, Netherlands). The bike leg is flat. The run is a flat 42.2 km course consisting of 2 loops along the beach and the Zeedijk in Knokke-Heist.
The new one-loop 3.8km ROKA swim course is located in the historic fort city of Sluis in the Netherlands. Taking place in the Damsche Vaart, it promises a tidal-free and wave-free swim with unparalleled support.
The final 42.2 km run takes place along the beach in 2 loops, taking athletes along the Zeedijk while being cheered on by residents before crossing the finish line in Knokke-Heist.
No, IRONMAN full distance races don't have relay entries.
All athletes must be a minimum of 18 years of age as of race day for the event year to compete in this event.
All age group athletes must compete in their age group division corresponding to the athlete's age on December 31st of the year of the event.
No, only registered athletes are allowed into athlete check-in. Please bring your photo ID and triathlon membership card (if applicable) during the designated check-in hours. All athletes must check-in during designated hours, no exceptions.
No, we do not have a waiting list.
Unfortunately, due to high congestion in the finish line area, no spectators will be allowed. Please do not try to gain access to this area, as it must remain clear for the safety of the athletes.
No. There will be a medical information tent next to the medical tent where medical updates will be available on athletes who enter the medical tent.