Mount of el Estepar Nature · Hoyo de Manzanares, Cuenca Alta del Manzanares, Madrid At 1,403 metres it is the highest point of the district of Hoyo de Manzanares and the main summit of its sierra, a granite massif split off from the Guadarrama ridge and separated from it by the valley of the Manina stream. Photo: Miguel303xm (CC BY-SA 3.0) What to see and do in Hoyo de Manzanares