100 MILLAS MATALLANA is a 161 km mountain and ultra-distance race held in Orzonaga de Torío, León. It takes place in late June and offers two formats: mountain running and ultrafondo, emphasizing a long off-road course over a short local road event.
The course details indicate that runners will have access to both liquid and solid aid stations. The Ayuntamiento de Matallana organizes the event, providing timing, restrooms, a runner's bag, trophies, medals, and a finish-line speaker.