Castru Valnera or Castro Valnera is a peak located in the central area of the Cantabrian Mountains, in Burgos, northern Spain. It is around it that the whole Pas valley revolves, and also the source of the Miera River, between the Portillo de Lunada and Estacas de Trueba passes.
Castru in Cantabrian refers to an abrupt rocky peak.
Address 09560, Spain
Coordinates 43°8'45.056" N -3°40'54.84" E