
The area contains remnants of two ancient glaciers, Garganta and Recuenco, and is the source of both the Jarama and Duratón rivers. In 2005, the regional government established environmental protection by creating the Lobo-Cebollera Massif Natural Reserve, safeguarding this virtually pristine area that was under threat from military interests.
It's an excellent area for mountain hiking, with low-difficulty routes and unbeatable views of various peaks. The most famous route is undoubtedly the SPG-7 trail, which starts in the municipality of Somosierra in the Community of Madrid. Before setting out, we recommend checking these essential hiking equipment tips if you're planning to attempt it.

How to get there:
The route begins at the Somosierra Pass service station. Park your car opposite a small chapel across the road from a Hotel-Restaurant. These are the exact coordinates: Latitude 41° 8'6.31" N Longitude 3° 34'51.39" W

Starting the route:
After passing through metal gates and climbing a steep slope, you'll reach a water deposit. Continuing the constant ascent brings you to a small viewpoint overlooking the Los Chorros Waterfall, source of the Duratón River - famous for its gorges in Segovia province.
A bit further on, you'll reach a pine forest. Beyond this comes a section with several sharp bends, the last featuring another viewpoint with spectacular vistas of Peñalara, the Lozoya Valley and Robregordo.
From here the trail becomes less challenging as it follows the mountainside, until a perpendicular path leads to the ridge. This section is the most demanding part of the route.

At the top you'll find trails popular with mountain bikers, leading to Cebollera Vieja. Following this track takes you to the summit of Cebollera Vieja, not before enjoying views of Cabeza de Tempraniego and Cerro del Recuenco.

You'll know you've reached the summit when you find the monolith erected in honour of the Forest Agents. In clear weather you can see Peñalara, the nearby Pico del Lobo, the Guadalajara mountain ranges and almost the entire province of Segovia.
For the return journey, there are alternative but more difficult routes, so we recommend retracing your steps along the original path.

A highly recommended route for those seeking a nature experience in one of Madrid's most popular Adventure Tourism areas.
We also suggest checking out the local hiking companies.
Oh! And if you fancy it, you can follow local tradition by taking a St Christopher holy card - the patron saint of travellers!