The mountain passes of Lunada and Estacas de Trueba Activity · Espinosa de los Monteros, Las Merindades, Burgos Image of Espinosa de los Monteros, not of the place itself. Two mountain passes cross towards Cantabria from the municipality: the portillo de Lunada, at 1,350 metres, and Las Estacas de Trueba, at 1,154, both classics of cycle touring and gateways to the meadows of the Cordillera. Photo: Jesús Ignacio Bravo Soler (CC BY 3.0) What to see and do in Espinosa de los Monteros