Cycling in Madrid shared-use paths. The most important shared-use path is Madrid Río, a park located in the banks of the Manzanares River and opened in 2011. Car-shared lanes and streets (in Spanish: ciclocalle o ciclovía) are very frecuent in Madrid. They are marked with the drawing of a bicycle on the pavement, and they are speed limited to 30 km/h. In Madrid, there are many bike sidewalk paths (in Spanish: acera-bici). Some are located in O'Donnell Street or Serrano Street. Greenways (in Spanish: pista-bici) are independent cycle routes, for example the Royal Route GR-124. BiciMAD is a public service of bicycle-sharing. It
Community of Madrid fluvial river basins. Province of Madrid occupies a surface area of approximately 8,028 km (1.6% of all Spanish territory). More specifically, the exact position of Madrid is 3° 40´ of longitude west of Greenwich, England, and 40° 23´ north of the equator. Practically all of the Province is located between 600 and 1,000 m above sea level, with the highest point being Peñalara at 2,430 m and the lowest Alberche river in Villa del Prado at 430 m. Other considerable heights, as well as being famous, are the Ball of the World mountain (la Bola del Mundo) in Navacerrada, at