40 Carrera del Arbol is a 5K solidarity race in Madrid, organized by Club Deportivo El Arbol. The main event is a popular road race, starting at 09:30 and designed for everyday runners, not exclusively fast club athletes.
The program also includes children's races and activities for kids, allowing families to spend the morning there rather than just watching the 5K. Wheelchair participants have their own category. Runners receive liquid and solid refreshments, medical support, a runner's bag, and a speaker at the finish line to maintain the event's momentum.