The Andes traverse Ecuador north-south, splitting into two parallel ranges that define the country's geography, climate, and life.
Younger, more volcanic. Hosts Cotopaxi (5,897m, active stratovolcano), Cayambe (5,790m, highest point on equator), Tungurahua (5,023m, "Throat of Fire"), Guagua Pichincha (4,784m, overlooks Quito). Cloud forests cloak western slopes; paramo grasslands crown summits.
Older, more eroded, higher. Chimborazo (6,263m) dominates—Earth's farthest point from the center due to equatorial bulge, making its summit closer to space than Everest's. Antisana (5,704m), Altar (5,319m, collapsed caldera). Eastern slopes drain to the Amazon.
Between the ranges, a fertile corridor (2,500–3,000m) hosts Quito, Cuenca, Riobamba, Ambato—most of Ecuador's population and agriculture. Humboldt called it the "Avenue of Volcanoes."
Glaciers feed rivers for hydroelectricity (60%+ of power) and irrigation. Paramos act as water sponges. Biodiversity: spectacled bear, condor, paramo deer, hundreds of endemic plants. Tourism: climbing, hiking, birding, cultural immersion.
Climate change is shrinking glaciers rapidly—Cotopaxi lost 30% ice mass since 1976—threatening water security for millions.