Les 21 de la Nordique centers on a 21 km Nordic walking challenge in Castelnau-le-Lez, beginning and ending at the Palais des Sports. Jogging Castelnau organizes this event, typically held in early March. It features timed races: a 21 km solo event, a relay for teams of two or three walkers, and a 9.5 km solo race. A 6 km leisure walk is also available for those seeking the event atmosphere without competition.
The primary 21 km race consists of six 3.5 km laps on the Castelnau-le-Lez health course. This circuit allows participants to pass through the same area multiple times, differing from a point-to-point course. The structure appeals to dedicated Nordic walkers, relay participants, and those progressing from shorter or leisure walks. The inaugural event saw 63 participants, with 23 finishing the 21 km solo distance, reflecting a local, club-driven character over a large-scale city race.