Colombia’s Terrain: Andes, Amazon, Llanos, Coasts, and Deserts

Colombia’s topography is a vertical mosaic—three Andean cordilleras, two coasts, Amazon, Orinoco plains, and isolated massifs.

1. Andes Mountains (Three Cordilleras)

• Cordillera Occidental – Pacific flank, lower, volcanic (e.g., Cerro Tatamá 4,100m).
• Cordillera Central – Spine, highest: **Nevado del Ruiz** (5,321m), **Nevado del Huila** (5,364m). Glaciers, paramo.
• Cordillera Oriental – Broad, eastern, splits near Bogotá: **Altiplano Cundiboyacense** (2,600m) and **Sierra Nevada del Cocuy** (5,493m).

2. Coastal Plains

• Caribbean: Narrow (Urabá, Sinú, Magdalena delta). Barranquilla, Cartagena, Santa Marta. Ciénaga Grande wetlands.
• Pacific: Wider, rainforest-backed (Chocó). Buenaventura, Tumaco. Highest rainfall on Earth (~10m/yr).

3. Amazon Rainforest (Amazonia)

• ~40% of country. Departments: Amazonas, Vaupés, Guainía, Caquetá, Putumayo.
• Rivers: Amazon, Caquetá, Putumayo, Vaupés. Biodiversity hotspot. Indigenous territories.

4. Llanos (Orinoquía)

• Eastern plains (Orinoco basin). Savanna, gallery forests, seasonal flooding.
• Cattle ranching, oil (Cusiana, Cupiagua), wildlife (capybara, anaconda, jabiru).

5. Sierra Nevada de Santa Marta

• **World’s highest coastal mountain** (5,775m Pico Cristóbal Colón). Isolated from Andes.
• Glaciers (retreating), cloud forest, dry forest, Caribbean beaches at base.
• Four Indigenous peoples (Kogi, Arhuaco, Wiwa, Kankuamo) — “Heart of the World.”

6. Inter-Andean Valleys

• Magdalena Valley** (north-south) – oil, coffee, hydro.
• Cauca Valley** – sugar, coffee, Cali.
• Altiplano Cundiboyacense** – Bogotá (2,640m), highland agriculture, páramo (water source).