Ministerio de Agricultura, Pesca y Alimentación
Buscador principal

Santander-Mediterráneo Nature Trail. Castellanos de Bureba-Quintanilla Vivar section


CN Santander-Mediterráneo. Tramo Castellanos de Bureba-Quintanilla Vivar

This old railway line runs among the valleys of the River Homino and the River Ubierna.

The province of Burgos is home to this double section of the old Santander - Mediterranean Sea railway route. The River Homino is the first travel companion; and by its side the town of the unforgettable naturist Félix Rodriguez de la Fuente is visited. Afterwards, the extraordinary Valle de Las Navas can be enjoyed, and the River Ubierna accompanies the traveller in the land of El Cid.

Antigua Estación Poza de la Sal

The itinerary starts 300 m from the town of Castellanos de Bureba (Burgos), where the Santa Lucia church offers unbeatable views, highlighting the cherry fields with the famed culinary value of this fruit. The route advances with the River Homino to the right, which snakes with its characteristic riverside woodland, with Riberas del Río Oca and tributaries being protected in its basin as a Site of Community Importance.

Not long after passing kilometre point two, a crossing is reached through which the town of Salas de Bureba can be reached, and the Rest Area can be found on the other side of this town. Once on the Nature Trail again, it leads south, heading parallel to road BU-P-5028. With said road on the right and the River Homino on the left, the old station of Poza de la Sal is reached, with its Rest Area next to the warehouse.

Camino Natural y Poza de la Sal

Metres prior to kilometre point 5, care must be paid when crossing road CL-633, to then reach the kilometre point leaving the Nuestra Señor Virgen de Pedrajas sanctuary-hostel on the left. Coinciding with kilometre point 6, road BU-V-5103 is crossed and an interpretation panel portrays the proximity to the beautiful town of Poza de la Sal, birthplace of the unforgettable naturist Félix Rodriguez de la Fuente, less than two kilometres away.

The views of the mountain range with the Castle of Rojas and Poza de la Sal on its slopes provoke the traveller to cast their gaze behind them for various kilometres. After passing kilometre point 9, the old Lences de Bureba stop is reached and soon after road BU-V-5021 is crossed, care must be taken here, and the town of Lences de Bureba is passed on the left. Highlights of said town include its medieval bridge and the church of Santa Eugenia.

Antiguo Apeadero de Lences de Bureba

Leaving the town behind, the path is lined with cereal crops and the River Homino is ever-present, leading quietly along a remarkable landscape where erosive processes take the limelight.

After kilometre point 13, the Rest Area at the Arconada stop allows the traveller to take a break. The building has been reformed and is in a good state of conservation. A few metres later, on the left of the route, the town of Arconada welcomes the traveller with the church of Santa Eulalia dominating the landscape.

The traveller delves fully into Valle de Las Navas, and as the kilometres advance they are able to enjoy the various colours offered by the different layers that have come to light after large erosive processes. The beauty and calm breathed in the valley of the encased River Homino cause the walker to experience a pleasurable feeling of isolation and disconnection from the worldly noise.

Antiguo Apartadero de Arconada

The old railway route turns various times to the left and right with a wide and characteristic turn radius, with kilometre point 20 being reached slightly after the town of Lermilla, with the Rest Area of the same name prior to this. After passing the River Homino and crossing the road via which the town is accessed, the old Lermilla-Quitanarruz stop is reached. Shortly afterwards, kilometre point 21 is reached and finally, before entering the town of Quitanarruz the first part of the route from Castellanos de Bureba to Quintanarruz comes to an end.

Continuing from the same point, kilometre point 0 marks the beginning of this second part, fittingly passing through the town of Quintanarruz along the street called La Vía. After leaving the town, the route heads south where the cork oak forests are increasingly more abundant.

Ermita de Ntra. Sra. de los Ángeles

On the top of a small headland stand the ruins of what was once the Shrine of Nuestra Señora de los Ángeles, and shortly afterwards a wooden bench enables for the botanical richness of the River La Molina to be enjoyed. After passing kilometre point 4, the town of Cobos Junto a La Molina can be seen, with its church of San Torcuato being the most notable building.

Continuing comfortably the kilometres pass by, until reaching a small Rest Area at La Molina de Ubierna, where a well-deserved break to regain strength can be taken. After passing kilometre point 7, the church of San Román can be seen. This is where various scenes of the Passion of Jesus take place, performed by the residents of La Molina de Ubierna on Good Friday. At the crossroads that provides access to the town, there is an interpretation panel that invites visitors to visit said town.

Túnel de la Hoz

The route continues without large shocks, until the old gatekeeper booth is reached, which has these days been converted into housing, just before the CL-629 road crossing, where care must be taken. Not long afterwards the town of Peñahorada is reached, and there is another Rest Area here. Around kilometre point 11, the traveller reaches the old station of Peñahorada, where the passing of time is noticeable just by observing its current state.

The route continues in parallel to road CL-629, leaving an old mineral loading bay in a good condition on its left. Not long after passing kilometre point 12, the Callejón tunnel (120 m) and the La Hoz tunnel (84 m) are reached. Due to their short lengths, they do not have artificial lighting and thus it is recommendable to enter with a torch. Immediately afterwards, road CL-629 is crossed via an elevated bridge for this purpose and little by little the rocky massif in which the scrubland of evergreen oaks populate its slopes are left behind.

Iglesia gótica de La Mota

The ruins of the Gothic church of La Mota precede the old Villaverde Peñahorada stop, both to the left of the route. The rain-fed cereal crops and the plains take the limelight as road BU-V-5008 is crossed, with care being taken.

After passing kilometre point 16, a bridge crossing the River Ubierna is taken, with this being the prelude to the travellers’ entrance to Sotopalacios. The castle of Los Adelantados is particularly noteworthy in this town, as is, from a culinary perspective, the preparation of morcillas (black pudding).

The old railway route is left momentarily upon reaching the town, advancing along the path parallel to road N-623 (from Burgos-Santander inside the urban nucleus). This road is crossed via the traffic light controlled pedestrian crossing. Shortly afterwards, a right turn is taken to get back onto the old railway route at the old Sotopalacios station, where two large horse chestnut trees (Aesculus hippocastanum) enable for strength to be regained at the Rest Area.

Área de Descanso antigua Estación de Sotopalacios

The town is left among cropland, leaving behind the trail that provides access to Quintanilla Vivar, located less than 1 km from the Nature Trail. Road A-73 is passed via an underground subway, and the old railway route is taken again, crossing the River Ubierna once again by means of the corresponding bridge. Without further ado, kilometre point 22 is reached, carefully crossing road BU-V-6279 that leads to Sotragero, and shortly afterwards finding the interpretation panel that puts an end to this double section of the Santander-Mediterranean Sea Nature Trail between Castellanos de Bureba-Quintanarruz and Quintanarruz-Quintanilla Vivar.


MIDE CN Santander-Mediterráneo. Tramo Castellanos de Bureba-Quintanilla Vivar

MIDE (Method for the Information of Excursions)

(Calculated according to the MIDE criteria for an average excursionist with a light load)


Further information

Poza de la Sal

The English translation of this town in Burgos is “Salt Pond”, and as its name suggests, its history is linked to salt extraction activities. Traces of Neolithic settlements provide suspicion of rudimentary salt extraction activities. The Romans, Visigoths and Moors perfected the collecting of this valuable substance used for food conservation. The Casa de Administración de las Reales Salinas (Royal Saltworks Administrative House) and the La Magdalena and Trascastro warehouses date back to the splendour of the 18th century. There is a rich architectural heritage, declared as Site of Cultural Interest, with examples such as the El casco antiguo de la villa (old town), the Castle of Los Rojas, the salt mines and the church of San Cosme and San Damián, whose municipal festivities are held on 26 and 29 September. The most famous person from here is the unforgettable Félix Rodriguez de la Fuente.

Su vecino más ilustre es el inolvidable Félix Rodriguez de la Fuente.


A town in Burgos belonging to the municipality of Merindad de Río Ubierna, which is its capital. The first documentary records of this town date back to the 12th century, although its origin was probably prior to this. It has a rich architectural heritage made up of the Castle of Los Adelantados, the church of Nuestra Señora del Acorro, the church of San Martín (known as the shrine of the town) and the Casa de Los Tiros building, declared as a Site of Cultural Interest in 1992. It has its patron saint festivities on 8 September and on the second Sunday in November the fair takes place for the town’s most famous product, morcilla (black pudding).

Introducción general al uso de cookies en

Las cookies son archivos que se pueden descargar en su equipo a través de las páginas web. Son herramientas que tienen un papel esencial para la prestación de numerosos servicios de la sociedad de la información. Entre otros, permiten a una página web almacenar y recuperar información sobre los hábitos de navegación de un usuario o de su equipo y, dependiendo de la información obtenida, se pueden utilizar para reconocer al usuario y mejorar el servicio ofrecido.

Tipos de cookies

Según quien sea la entidad que gestione el dominio desde donde se envían las cookies y trate los datos que se obtengan se pueden distinguir dos tipos: cookies propias y cookies de terceros.

Existe también una segunda clasificación según el plazo de tiempo que permanecen almacenadas en el navegador del cliente, pudiendo tratarse de cookies de sesión o cookies persistentes.

Por último, existe otra clasificación con cinco tipos de cookies según la finalidad para la que se traten los datos obtenidos: cookies técnicas, cookies de personalización, cookies de análisis, cookies publicitarias y cookies de publicidad comportamental.

Para más información a este respecto puede consultar la Guía sobre el uso de las cookies de la Agencia Española de Protección de Datos.

Cookies utilizadas en la web

El portal web del Ministerio de Agricultura, Pesca y Alimentación utiliza Google Analytics, esta es una herramienta de analítica que ayuda a los sitios web y a los propietarios de aplicaciones a entender el modo en que sus visitantes interactúan con sus propiedades. Se utilizan un conjunto de cookies para recopilar información e informar de las estadísticas de uso de los sitios web sin identificar personalmente a los visitantes de Google. Más información sobre las cookies de Google Analytics e información sobre la privacidad. Estas cookies se pueden rechazar o aceptar ya que no interfieren en el funcionamiento de la página web pero sirven de gran ayuda aportando información que posibilita un mejor y más apropiado servicio por parte de este portal.

Por último, se descarga una cookie de tipo técnico denominada cookie-compliance, propia, de tipo técnico y de sesión. Gestiona el consentimiento del usuario ante el uso de las cookies en la página web, con el objeto de recordar aquellos usuarios que las han aceptado y aquellos que no, de modo que a los primeros no se les muestre información en la parte superior de la página al respecto. Esta cookie es de obligada utilización para el funcionamiento correcto del portal.

Aceptación / Rechazo de la Política de cookies

El Ministerio de Agricultura, Pesca y Alimentación permite la aceptación o rechazo de las cookies no esenciales para el funcionamiento del portal. Para ello una vez que el usuario acceda al portal se mostrará un mensaje en la parte central con información de la política de cookies y las siguientes opciones: 

  • Aceptar cookies: Si el usuario pulsa este botón, se aceptarán los cookies no obligatorias y no se volverá a visualizar este aviso al acceder a cualquier página del portal.
  • Configurar cookies: Si el usuario pulsa sobre el botón de configurar, se accederá a una segunda ventana modal donde se podrá configurar que cookies aceptar. Esta segunda ventana explica las cookies utilizadas en la actualidad y permite la selección o rechazo de las cookies no obligatorias. Una vez finalizada la selección se deberá presionar al botón Guardar configuración.

Cómo modificar la configuración de las cookies

Usted puede restringir, bloquear o borrar las cookies del Ministerio de Agricultura, Pesca y Alimentación o cualquier otra página web, utilizando su navegador. En cada navegador la operativa es diferente, la función de "Ayuda" le mostrará cómo hacerlo.