Zetas de La Pedriza is a 21.7 mile loop trail located near Manzanares El Real, Community of Madrid, Spain that features a river and is rated as difficult. The trail is primarily used for hiking, running, and mountain biking and is accessible year-round.
This is a popular trail through the forest. Mountain bikers love this trail. It takes you by La Nava and it is best in the spring and autumn as the summer can be too hot and there can be too much snow in the winter. There are several offshoots and adaptations that you can make on this route.
Very nice trail and place to go. It doesn't require much of MTB or downhill skills but still provides you enough fun when going down and quite an exercise while climbing up. It was my first "longer" trip this year (after winter following by covid-19 quarantine) so I probably did it a bit slower than others. You might meet many people in the "base camp" but don't worry, you won't meet most of them on the top :) (especially if you start afternoon though)