La Cal'lys Gravel begins at Base Tom Souville in Sangatte, on the Pas-de-Calais coast of northern France, scheduled for late April. It is a non-timed gravel ride, not a race against the clock, offering four distance options: 80 km, 120 km, 200 km, and 300 km.
The routes traverse the Opal Coast and its inland countryside, within the Caps et Marais d'Opale Regional Natural Park. Le Lys Calais Triathlon organizes the event, with a deliberately social atmosphere. New courses may emerge, but the core concept remains true to the motto, “Ride far, ride free!”