Circular route that shares the same path as Trail 13 to the Serra do Castelo. From this point it turns off towards Gestaçó and Teixeiró, afterwards cutting through the village of Várzea. In Teixeiró you have to go up to the Capela da Senhora do Socorro (Chapel of Senhora do Socorro). This route then crosses the Serra do Marão via the south-facing slope, and heads towards Loivos do Monte by the EN321, linking up again with the Red Trail. This is a difficult trail and good technical and physical preparation is recommended if you intend to follow it.