Media Maratón BTT Los Castañares

The Media Maratón BTT Los Castañares is a mountain bike half-marathon held in Constantina, in the Sierra Norte de Sevilla Natural Park, on 11 October 2026. Organised by C.D. Summits, it forms part of the Sevilla Provincial BTT Half-Marathon Circuit and is one of eleven half-marathons on the 2026 calendar. The course winds through chestnut forests and the trails of Los Castañares within the Sierra Morena, on a route showcasing the protected landscapes of northern Seville. The event is sanctioned by the Andalusian Cycling Federation.