KV Valdezcaray - Mayores is a mountain race for adult runners at Valdezcaray, with a demanding uphill effort instead of a flat road course. Its defining feature is 1,200 meters of positive elevation gain, requiring climbing strength from the outset.
The route is part of the Spanish Championship and is considered one of the more challenging mountain races. Runners require endurance for the extended ascent, skill for the mountain terrain, and perseverance when the incline intensifies.