The Alto Porma BTT, a mountain-bike race held in the Porma region of León, frames itself as a contest between León and Asturias. Organized by Club Deportivo Los Jabalíes de Puebla de Lillo, the event takes place in late May and attracts participants from the adjacent provinces of León and Asturias.
The course covers 45 km with 1,300 meters of elevation gain, presenting a challenging off-road course. Participants select the region and jersey they wish to represent. Awards are given to the top three finishers from each region, a five-minute bonus is applied to the overall winner's time, and a special prize recognizes the club with the highest number of participants. Both standard mountain bikes and e-bikes are accommodated with their own categories.