5150 KNOKKE-HEIST - Swim - Conquer the North Sea: The journey commences with an adrenaline-pumping 1.5km (0.93 mile) swim, setting the stage in the crystal-clear waters of the North Sea. Positioned right in front of Heist beach's bike park, picture yourself plunging into the open sea, surrounded by the invigorating salty breeze. This swim course is designed to challenge and exhilarate, with the starting and finishing points approximately 800 meters apart, allowing you to savor the majesty of ...