Ibérica Norte is an open route of 552 km and 10,363 m of climbing linking La Rioja, Soria, Navarre and the Basque Country, with 65% of the route unpaved. It was designed by Carlos Cuezva and published on bikepacking.com.
It can be ridden at any time, usually in spring or autumn. The original page offers the GPX; since it does not state a content licence, we only link to it here.