By coming down from Collado Bermejo you will first find the Lagoon of Valdeazores, a natural stagnation of the stream of the same name that has been repressed with a wall at its bottom. The lagoon is an intense turquoise blue, surrounded by nozzles, strawberries, complaints and maples.

About 800 meters later you will find the reservoir of Aguas Negras, another paradoxical place where a dam was built years ago for the hydroelectric use of the Borosa River.

Crossing the dam and walking a few hundred meters you can reach the birth of Aguas Negras - or the birth of Boros- an emergency that helped by the Arroyo del Inferno gives rise to some of the most important tributaries of Guadalquivir in its high stretch.

We suggest:

• From the Interpretation Centre of the Borosa River (next to the farm), a well-known route to the reservoirs, passing through the Cerrada de Elias and the leap of the Organs. If you have time, give a day to this spectacular route.

• Visit the San Pedro Navy by the way we had brought to the hill of Fuente Bermejo.

In Cazorla take the Sierra road (A-319) until the crossing known as the Empalme del Valle. Turn right on the JF-7092 road and after passing the bridge over the Guadalquivir River (4 km from the Empalme) follow the left track (JF-7091). We go through the Nava del Espino, the Nava de San Pedro, the Nava Ciazo and follow in the direction of the Campos, but before we reach them, on the Collado de la Fuente Bermejo a road to the left takes us to the lagoons.

How to get there

Taking the asphalt road that leaves Montizon, you reach a fenced area without a door; from there the road is ground to the Sobrant. There are indicators that signify the itinerary. It can be accessed by vehicle tourism.

As we approach the Earth Bridge, the landscape becomes ruinous and lunar-looking. The immediate environment is full of hills and saws.

This natural enclave blends forest spots (especially pine trees) with white areas without just vegetation. We can observe wild vegetation and numerous repopulations of different ages. There is a wide range of shrubs and grasses adapted to the scarcity of rain, as it corresponds to its location in one of the most torrid areas of the Sierra Magina region.

In the area we can see around us and on the very floor of the road, the effects of water erosion on the geological materials around us. It is a succession of minions that extend in depth by communicating with each other. When the rain water circulates on the surface, it is soon filtered through these holes, but dragging many suspended particles that sometimes form true clay slices. It is easy to imagine that the erosive power is increasing more and more, so the mixes join each other to form the greater ones. When it affects a road, the risk to circulation is evident, whether by car, bike or even walking. In this process is the origin of the formation of the Earth Bridge.

The process is given on soft materials such as margas, margous sands or uncompact clay sands. If there was a somewhat more compact and resistant material tank above them, it may not be eroded so easily, leaving a package of materials suspended in the air. The objective of this route is to check on-site the extraordinary dimensions of this phenomenon.

Finally remember that we are on the margas of the Cretaceous, a period in which marine animals such as amonites, belemnites, and other gastropods lived, which we can find through the fossilized and pyritized soil.

El Chorro is on a platform at 1350 m of altitude, flanked to the west by the large cuts that raise the foothills of the saw on the jiennese countryside, and to the east by Mount Gilillo (1847 m). In the skirt that forms this platform is extended an extensive black pine pinar, which is what is called in the area to the Pinus pinaster.

The orientation of this hillside we walk through is west and northwest, making sunsets a great added value to the enjoyment of the pine. In this area, an observatory of rapacious birds has been installed, especially of lethal vultures.

This black pine saw its area of natural presence expanded by serving as a raw material in the extraction of the essence of trementine (avocado), the main product that is obtained from the resin. In the early 20th century many slopes of these saws were populated with this pine.

The pineapple that we visit is barely sotoscala at first, but then it is enriched with endrines (Prunus spinosa), majuelos (Crataegus monogina), skirmishes (Rosa spp.). As we reach the stream of the Chorro, this little forest is thick and on the front side that has a north orientation is enriched with madreselvas (Lonicera peryclimenum hispanica), with mountain roses (Paeonia broteroi), and numerous orchids (Orchis cazorlensis, Orchis tenera, Neotinea maculata,...).

LOCATION

We access the road that leaves La Iruela in the direction of Riogazas and the Chorro. About 10 km away we reach an old forest house on our left and on the shore of the road. From this point we follow the track already walking, not more than 2 km., through a thick forest of black pines (Pinus pinaster).

After walking through this pine tree and returning to the track we have accessed, if we look south, the clear days look perfectly Sierra Nevada and looking north the Gualay valley opens. The track opens through the rocky moles of the Cabañas peak and the lastras of the Cagasebo rope.

This forest is dominated by the salgarean pine (Pinus nigra salzmannii), which is sometimes accompanied by maple (Acer granatense), mustard (Sorbus aria) and whine (Quercus faginea), and in the sotoquela by rastera savines (Juniperus sabina), rake juniperus (Juniperus communis hemisphaerica), thorns (Berberis vulgaris australis), tirelles (Prunus postrata), enamubios (a), and other species (the celium (a), as well as the celium (a), and the celibelium (a), and the celium (a).

The name that has always been known in these saws to this pine is that of Salgareño. The etymology of his name is as beautiful as the pine itself; salgareño comes from sarga, a vulgar name with which several willows are known. It alludes to the fine and slender of the branches, as does the pine bear when young, slender and right. By this slender and fine figure, the ancient inhabitants of the saws baptized this pine of the high mountain of Serrana as Salgareño.

We access Puerto Llano on the track from the birth of the Guadalquivir to Pozo Alcón. Puerto Llano is the highest point of the track, where we are surrounded by a splendid pine pine pines, called salgareños in these saws.

The main attraction of this forest track is the carrasco pine forest that crosses, under which a closed forest of oak, madroños and doves grows. In addition, just as the village of Puentehonda appears before us, we see on the right, on the same road, two gigantic and venerable examples of carrasco pine, which are included in the Inventory of Singular Trees of Andalusia with the names of Pino de los Barrilos de Puentehonda and Pino del Cerro Bucentaina and respectively. The latter is 32 m high and 4.5 m in diameter at its base.

If of any pine you can say is Mediterranean, this is the carrasco pine (Pinus halepensis). Its same vernacular name indicates hardness, as it is a tree that colonizes rocky, arid grounds, stony and sunny slopes, where no other tree can live. Because of its capacity to hold in dry periods (it survives with less than 300 mm of rain per year) and its colonizing capacity of degraded and dry areas, it extends through much of the Park, from its basal areas to 1600 m of altitude. This pine has been, next to the Salgareño, one of the most planted pine trees in the mountains of these saws. Where the aridity is noted, a tree plants it face: our carrasco pine.

The normal thing in the composition of this forest is to find an arbustive stratum characteristic of the serial phases of the Mediterranean forest, usually of initial phases, but also with an arbustive stratum of more advanced phases in the process of plant succession. This is how we find pineapples with rosemary (Rosmarinus officinalis), lentils (Pistacia lenticus), cornicabras (Pistacia terebinthus), aliagas (Genista scorpius), jara morisca (Cistus salvifolius), juniperus oxicedrus (juniperus oxicedrus). fumans (fumana thymifolia), asparagus (Asparragus acutifolius). There are also numerous aromatic plants, such as ejanas (Thymus masticina) and omilos (Thymus orospedanus, Thymus zigis), but a species that almost always accompanies the carrion pines is the spartum (Stypa tenacsima).

LOCATION

Start of the tour in the Recreative Area of La Peña del Olivar, on the road from Siles to Las Azeas. It's marked PR-A 175. This route, of just under 5 km, runs along a narrow forest track that we recommend to walk. The first kilometer is quite steep, but the rest is barely at a level.