Triathlon d'Halluin Vallée de la Lys

Race facts

• The course covers 40 km.
• It takes place on a Monday, September 21, 2026 — autumn in this part of the world.
• The closest comparable triathlon event is Triathlon et Duathlon de l'Audomarois in Arques, 57 km away, on September 12, 2026.
• 12 of the 12 most similar events take place in the same month.