Travesia BTT Alsasua-Altsasu

The 29th Travesía BTT Altsasu-Alsasua is a mountain bike marathon staged on 14 June 2026 in Altsasu (Alsasua), in the Sakana valley of northern Navarre, Spain. The event is organised by the local Barranka Txirrindulari Taldea cycling club and has been held annually since 1996, drawing several hundred riders to its forest tracks and climbs around the Aralar and Urbasa-Andia ranges. Routes typically include a long marathon and a shorter recreational option, both starting and finishing in Altsasu. It is a classic spring fixture of the Basque-Navarran MTB calendar.