Segunda prueba de una nueva edición del Circuito Basque Ultra Trail Series 2019 - 2022
The BASQUE ULTRA TRAIL SERIES Circuit is a set of four mountain races of ultra-distance in line and semi-self-sufficiency. The Circuit unites the three Basque capitals and the Navarre over four years in mountain runs. The four tests will have a length of between 110 and 140 kilometres each and add 500 kilometres.
You can find more information about the event on the official website of the event.