The mountain range primarily located in Chile and Argentina is the Andes Mountains. This extensive mountain range is the longest in the world, extending over 7,000 kilometers along the western edge of South America. The Andes are known for their dramatic landscapes, diverse ecosystems, and significant cultural heritage. They influence climate and weather patterns across the region, playing a crucial role in agriculture and water resources. The Andes attract tourists for their stunning beauty, offering activities like hiking, skiing, and mountaineering.