If you have done Route 1, in this case we will extend it to reach Sakana and ascend to San Miguel de Aralar on the Uharte Arakil side. If, on the other hand, you have not yet done it, it should be noted that the initial and final part runs along the paths and quiet roads of the Larraun Valley.
As for the technical aspect, it should be noted that it is a simple route as it takes advantage of roads in good condition, being the Greenway of Plazaola and the roads of Sakana protagonists of much of it. However, physically it is a route where you have to be in good shape because, in addition to the ascent to San Miguel de Aralar, there is the final part from Azpirotz to Beruete.