With the warm weather and long spring days, the Madrid mountains become the perfect place for a stroll, surrounded by green meadows, wildflowers, and streams full of water. Just one hour from Madrid, the Puente de la Angostura trail lets kids and adults alike enjoy a fairytale forest right in the heart of the Sierra de Guadarrama.
The route is about 6 kilometers long and allows you to walk along the Angostura stream, reach the Pradillo Dam, and finally arrive at the majestic bridge that gives the route its name. The bridge was commissioned by Philip II so that he could travel by carriage from his residence at La Granja de San Ildefonso to the monastery of El Paular.
Today, the bridge has become a tourist and hiking attraction, perfect for enjoying nature and taking photos. The surrounding vegetation gives it a very romantic atmosphere, and it’s an outing you can enjoy with children or accompanied by dogs.
Bridges, streams, and a dam

This natural enclave is located in the municipality of Rascafría, northwest of downtown Madrid. Specifically, it lies within the Lozoya Valley, known for being home to many other scenic landscapes of the Sierra de Guadarrama.
The trail begins at the Isla recreational area, whose restaurant serves as the starting point. The best way to get there is by car, driving to kilometer 32 of the M-604, where vehicles can park.
Next, the trail runs along the right bank of the Angostura stream, crossing several bridges that offer views of the crystal-clear water in its natural setting. By following the PR trail markers and the R.V.-1 signposts, it’s easy to follow the route until you reach the Pradillo Dam, where the water plunges down with great force.
A historic bridge nestled in nature

From there, the trail narrows and winds through the forest for about 2.5 kilometers, lined with roses and other wildflowers that add color to the surroundings.
Thus, the route leads to the long-awaited Puente de la Angostura, a historic landmark nestled in a small granite canyon. Particularly striking are the water flowing beneath its arch and the moss covering the stone, completely enveloping it in nature.
To return to the starting point, simply cross the bridge and retrace the route in the opposite direction, this time on the left side of the stream, following a wider and more comfortable path. The landscape repeats itself and retains its splendor, characteristic of the Lozoya Valley in the spring.