The Maliciosa is one of the most important and with 2,227 metres one of the highest mountains of the Sierra de Guadarrama. Its peculiar rock profile can unmistakably be recognized from a far distance. The summit is relatively easy to access from the Bola del Mundo, but on our route we make it ourselves more difficult by ascending it from Mataelpino, having to bridge more than 1,100 meters of altitude through the beautiful landscape of the Cuerda de los Porrones.
- From where we parked the car (1) we walk towards the telecommunications mast, which we pass on the left. Next, just behind the cattle grid (2), we turn right.
- We now follow this trail, cross the stream Arroyo de la Gargantilla and keep climbing strongly. Above we get at an open field from where we have a nice view over the surroundings. There where this open field narrows again, we turn left at the Y-junction (3). We cross the field completely and at its very end turn left onto a trail (4).
- We climb steeply through a sandy trail, farther down parallel to a fence. Where the fence ends, the path forks and we turn right (5), onto a trail marked with milestones.
- We keep ascending, further on go through a fence of wire and keep ascending through a steep trail to the Collado Porrón (6).
- On the Collado Porrón we turn left and follow the marking of white-yellow stripes and milestones. Through this marked path that ascends considerably (between 500 and 600 metres) but does not cause any difficulties we walk until the peak of the Maliciosa (7).
- From the Maliciosa we walk back through the same path to the Collado de Las Vacas (8). We cross this col until at the right at a number of milestones we see a path that goes downhill, which we enter.
- The path goes down steeply through stones and loose gravel and is well marked with milestones. It descends to the stream Arroyo de la Gargantilla (9) which we cross and at the other side we continue the path to the left.
- We keep following this path, which gets more and more comfortable and wider, until we return to where we parked the car (1).