
It houses remains of two ancient glaciers, Garganta and Recuenco and is home to the sources of the Jarama and Duratón rivers. In 2005, the autonomous government of La Mancha declared its natural protection by creating the Masizo del Lobo-Cebollera Natural Reserve, a practically virgin area that was threatened by military interests.
It is a magnificent area for mountain hiking, with low difficulty routes and unbeatable views of the various peaks. The best known is perhaps the SPG-7 route, which starts from the municipality of Somosierra, in the Community of Madrid. But first of all we recommend that you take a look at these equipment tips that you have to bring if you dare to do it.

How to get there:
The route starts from the port of Somosierra at the service station. We will leave the car in front of a hermitage on the other side of the road in front of a Hotel-Restaurant. These are the exact coordinates:Latitude 41º 8'6.31" N Longitude 3º 34'51.39" W

The route begins:
After passing the metal bars and climbing a steep slope, you will reach a water tank. Without stopping to ascend at any time we reach a small viewpoint where you can see the Los Chorros Waterfall, the source of the Duratón River, a river famous for its gorges, in the province of Segovia.
A little further on, we reach a pine forest and after passing it we reach a section with several sharp curves, the last of them with another viewpoint where you can enjoy the views of Peñalara, the Valley of the Lozoya and Robregordo.
From then on A less difficult section begins along the side of the mountain and a few meters later, a perpendicular path that leads to the ridge. This section is the hardest of all.

Upstairs you will find very common tracks for Mountain Bike fans, which lead toCebollera Vieja. Along this track, you reach the summit of Cebollera Vieja, but not before enjoying the views of Cabeza de Tempraniego or the Cerro del Recuenco.

You will know you have reached the summit when you find the monolith erected in honor of the Forest Agents. If the weather is good you will see Peñalara, the next Pico del Lobo, the Guadalajara Mountain Ranges and almost the entire province of Segovia.
To return there are alternative routes but of more difficulty so it is recommended that you return along the path we came from.

A highly recommended route for people looking for the experience of contact with nature in one of the most common areas of Adventure Tourism in Madrid.
We also recommend that you take a look at the hiking companies in the area.
Ah! And if you feel like it, you can follow the local tradition and pick up a stagram of Saint Christopher, the patron saint of travelers!