Crosskovacsi Sport and Environmental Association is a non-profit organization active in the area of Nagykovacsi and its surrounding Pilis region in the field of organizing MTB and other outdoor sport events, promoting healthy lifestyle, pursuing and popularizing nature sports, and being active in environmental protection.

One of the most popular events in the country is the annually organized Crosskovacsi Mountain Bike marathon, which attracts around 1000 racers. It is officially registered by the Hungarian sport authorities and professional bikers as well as amateurs (including families, children and seniors) take part in it.