A beautiful path will take you from the Valley of Lozoya (starting point at El Paular) to Puerto de Cotos. It is a 4 and a half hour walk with a 700 meter difference in height if you start at Cotos and finish at el Paular (descending).
We have tried a small bit the other way around (staring at el Paular) and we can easily recommend it to families, even with children. The path is well beaconed (although you need to be alert at the junctions), not too steep and full of lovely ponds to take a swim.
The route is shaded all along and therefore ideal when it is very hot. It is possible to follow it by foot, bike or even horseback. From the very start, you will enjoy a beautiful view on the former dam, which used to provide electricity to Rascafría. Then you will walk along a very nice mountain stream.
To reach departure point by car :
Take the A1 highway. At Km 69, follow M604 towards Lozoya, then towards Rascafría, and finally El Paular.
You may stop at the Centro de Educación Ambiental just opposite El Paular in order to grab the route description RUTA VERDE 1.
Continue after El Paular and stop at la area recreativa La Isla.
You then need to get round La Isla restaurant by the left-hand side and carefully follow the RV1 beacons.