In Pozalmuro we find the bar closed, we have little to do and a storm is also threatening, we fill the kettles with water and begin the ascent of the Sierra del Madero, the mountain pass of the day to jump the Iberian System and cross the Duero basin to the great valley of the Ebro. The climb is a cycle path with quite a slope, it has some studs to avoid the destruction of runoff and maintain the quality of the surface but they require extra effort on each step. The hard slope ends at an extraordinary viewpoint with signs of the landscape, the views are magnificent. Moncayo (2,314 m) is an imposing mass, the roof of the Soria mountains and the highest peak of the Iberian System. We follow the milestones of the natural path down a descent with a couple of delicate curves for the gravel wheels on the loose stone and then a well-conditioned and fun path in a holm oak forest of great environmental quality. The sky turns into hell and we arrive at the town of Muro when the raindrops turn into hail balls, luckily the bar is open here. In Muro is the site of the Roman city of Augustóbriga and in the bar room they have posters highlighting the notoriety of the place. The Roman town was decisive in the Roman conquest and control of the towns that lived in the mountain slopes of Moncayo.
The bad weather is persistent and we decided to finish the stage in Ágreda, an interesting town of three cultures on the slopes of Moncayo. At Hostal Doña Juana they are welcoming and kind to cyclists, even when they arrive soaked and their bikes are muddy. Before dinner there is time to see more towers, palaces, convents, stately homes and stroll through the Moorish quarter, passing through medieval gates with original battlements or in the shape of a horseshoe arch, such as the Puerta del Agua, from the 8th century, the oldest construction of the architectural heritage of Ágreda.