The Rio Elqui flows westward through the dramatic, arid landscape of the Coquimbo Region in north-central Chile, carving a path from the high Andes — reaching elevations of approximately 4,800 meters — down through a series of steep valleys to the Pacific Ocean. This river is a defining feature of the Elqui Valley, a region world-renowned for its production of pisco (Chilean brandy), with the river serving as the lifeblood of the grape-growing agriculture that dominates the valley floor. The watershed receives modest precipitation, averaging around 140mm annually, with most rainfall occurring during the winter months between May and August. The river's character is shaped by this arid, mountainous geography — a freestone river system running through rocky, steep terrain with the Andes as its headwaters source.