The route starts on the road towards Castellón. In front of a stone pylon and monument of the Maestrazgo we take a path between stone walls (700 m) that leads us to the Rambla de Las Truchas (km 3.5). After a sharp turn (km 4.5) we start the ascent through the ravine of La Tosquilla. We reach a forest refuge (km 10.7), among a beautiful pine forest. Further on, it links up with the asphalt road to La Nava (km 13.6) and with Route 4. (km 14). We continue, therefore, along the trail GR 8 next to the stone pylons and, further on, along the track in good condition to La Iglesuela del Cid (km 21.5).