The Chilean Coastal Range (Spanish: Cordillera de la Costa) is a mountain range that runs from north to south along the Pacific coast of South America parallel to the Andean Mountains, extending from Morro de Arica in the north to Taitao Peninsula, where it ends at the Chile Triple Junction, in the south. The range has a strong influence on the climate of Chile since it produces a rain shadow to the east. Because of this the vegetation growing on the seaward slopes is much more exuberant than in the interior. Compared to the coastal lowlands and the Intermediate Depression it is sparsely populated with land use varying from protected areas to grazing and silviculture. The range is present in all Chilean regions except for Coquimbo Region and Magallanes Region.
Like the Andes, the coastal range becomes progressively lower with increasing latitude. The range begins at Morro de Arica in the north and reaches its highest point, of 3114 m, in Sierra Vicuña Mackenna in the Antofagasta Region. Between Copiapó and Aconcagua rivers, in the so called Norte Chico region, the range fuses with the Andes. Just north of Santiago the range separates from the Andes but comes close to it again near Paine, a southern suburb of Santiago, and San Fernando. From Santiago south the range loses height until reaching the Bío-Bío River, beyond which the Nahuelbuta range emerges which reaches about 1500 m in its central parts. South of Nahuelbuta Range, in the Araucanía Region, the coastal range is replaced by a flatland area. South of Toltén River the range rises again as the Cordillera de Mahuidanchi. Beyond the heights of Corral this range changes into Cordillera Pelada. From Chacao Channel south the range is penetrated by the sea creating islands and peninsulas. Chiloé Island, the largest of these, has two ranges: Piuchén Range from Chacao Channel to Cucao Lake and Pirulil Range in the southern half. South of Chiloé the portions of the range above sea level form the Guaitecas and the Chonos Archipelagos. The southern extreme of the range forms the Taitao Peninsula and its sub-peninsula Tres Montes.