Green Series - Ollargan

Green Series - Ollargan is the Bilbao stop in the Green Series XCO, an international cross-country mountain bike championship in Spain’s northern zone. The wider series runs through spring into early summer, with UCI C2 races listed in places such as Bilbao, Erandio, Ortuella, Ispaster, Barakaldo, Ollargan, and Lezama. Ollargan sits within Bilbao in Bizkaia, so this round belongs to a compact Basque calendar rather than a single isolated race. The Ollargan listing includes a 5 km BTT option and a non-competitive option, which means the day is not only for riders chasing UCI points or series standings. The championship is built around XCO racing: repeated laps on off-road circuits, with short climbs, technical sections, and constant position changes instead of a long point-to-point route. The official calendar marks Ollargan as a UCI C2 round, while the event page notes that its exact date still needs final confirmation.