. The Bola del Mundo is the westernmost mountain of the
Cuerda Larga mountain range and is located in the central area of the
Sierra de Guadarrama, having on its southern slope the peak of
La Maliciosa (2227 m) and the
valley of La Barranca, to the west the
Navacerrada pass (1858 m) and to the east the rest of Cuerda Larga. To the north of the summit there is a small mountainous branch, called Loma del Noruego, which separates the
valleys of Valsaín, to the west, and
Lozoya, to the east. In the vicinity of the summit, on the northeastern slope, is the ski resort of
Valdesquí. Similarly, the
Puerto de Navacerrada ski resort is located on its western slopes. Near its summit, at an altitude of 2000 meters and on its southeastern slope, is the
Ventisquero de la Condesa, a place where there are several water springs that are the source of the
Manzanares river.
Cayetano Enríquez de Salamanca in his book (now
out of print)
Por la Sierra de Guadarrama (page 107), a person who was careful with the toponymy of the mountains, described the situation of the four Guarramillas: ".... the Guarramillas, a group of four summits about which there is an evident toponymic confusion, since some of them are called Guarramas, although this name does not exist (already in the 14th century Alfonso XI called them "
Guadarramiellas")...". The same author placed them from W to E, coinciding the 1st Guarramilla with the elevation 2181 m, is the most rocky and is located in it a sculpture of the Virgen de las Nieves, and the station / upper bar of the chairlift of the Puerto de Navacerrada; its highest point is attached and behind the bar, accessed by a rock staircase with protection cable. The 2nd Guarramilla was located at elevation 2210 m and to the W of the 1st, to the left of the concrete track (as we go towards the TV antennas) and topped with a metal cross, although its highest point is a small rock promontory a few meters further to the E. The 3rd Guarramilla is the highest, it is located to the ESE of the 2nd and in its summit plain the TV antennas are located; it has a geodesic vertex of the IGN at 2262m according to Cayetano E. de S. (to the S of the TV installations). Finally the 4th Guarramilla is a small projection seen from the N, and a plain approaching from the 3rd, and to the NNE of this one; about 300 m from this last one, Cayetano said to be at 2246 m. On the summit plateau an old rain gauge has been "recycled" as an information panel of the surrounding summits. To the N and at the foot of this elevation we can see the cone where the Valdesquí alpine ski resort is located. With the progress and improvement of current measuring equipment, the elevations cited by Cayetano E. de Salamanca are those corresponding to 2179 m, 2227 m, 2258 m, and 2248 m of the 1st, 2nd, 3rd and 4th Guarramillas according to the IGN maps in their latest editions. The route starts at the Navacerrada pass, climbs to the Alto de las Guarramillas, begins the descent at the source of the Manzanares River and, after a long descent, reaches
Manzanares el Real bordering
La Pedriza. == Access ==