Catharism was a heretic religious movement that, during the 12th-13th centuries, spread between the high classes and the nobility. Guillem de Belibasta was the last prefect of Cathar who was imprisoned in Castellbò. The path starts at the Queralt Sanctuary and enters the Alt Urgell village of Josa-Tuixent. It goes through the municipalities of Alàs i Cerc, La Seu d’Urgell, Valls de Valira and Montferrer -Castellbò, to enter the neighboring region of El Pallars and continue to the Castle of Montsegur. The path of the Last Cathar has a total distance of 190 km.