Geography of Peru

Location and Borders

The western border is formed by the Pacific Ocean, while the national borders in the north and east are with Ecuador, Colombia, and Brazil. To the southeast lies Bolivia, and to the south, Chile. Its location between the coast and the Andes dictates many everyday issues, such as water availability, agriculture, settlement areas, and transport routes.

The north-south extension also creates significant differences in sun exposure, seasonal patterns, and regional precipitation. High mountains and deep valleys act as natural barriers, directing air masses and cloud formation.

For a general introduction, also refer to the Peru Overview. Climate details can be found on the Climate in Peru page.

Costa, Sierra, Selva

The classic classification describes three major regions that stretch like long strips from north to south. The Costa lies on the Pacific, the Sierra encompasses the Andes, and the Selva extends into the Amazon basin. Many travel itineraries, economic regions, and types of nature can be particularly well explained by this tripartite division.

Costa

The Costa is narrow, often dry, and characterized by desert areas. Rivers flowing from the Andes create fertile valleys where agriculture, cities, and industry are concentrated.

Sierra

The Sierra includes high mountains, plateaus, and deeply incised valleys. Large differences in elevation create small-scale climatic zones that sometimes change within a few kilometers.

Selva

The Selva is predominantly warm and humid. Rainforest, river landscapes, and floodplains form vast habitats with very high biodiversity.

The Andes in Peru

A mighty section of the Andes traverses Peru from north to south. Snow-capped peaks, glacial lakes, volcanic cones in the south, and fertile highland basins characterize the landscape. The altitudinal zones range from sea level to almost 7,000 meters, which strongly influences agriculture, construction, and daily routines.

Raw materials such as copper, zinc, and gold play an important economic role in many Andean regions. At the same time, mining, water demand, and nature conservation often lead to conflicts of use, which vary greatly regionally.

The Andes also shape many historical sites. Particularly well-known are Machu Picchu, Sacsayhuamán, Ollantaytambo, and Tipón.

Costa: Coast, Desert, River Oases

The Costa appears contradictory at first glance: a long Pacific coastline, but very little rain in many places. A central reason lies in cold ocean currents off the coast, which cool the air and inhibit precipitation. Frequent consequences are fog and high fog, while measurable rain remains absent.

Rivers that originate in the Andes and flow to the coast are of great importance. Along these rivers lie the most important agricultural areas of the Costa, often with irrigation. Cities, ports, and transport routes are also concentrated in these corridors.

Typical landscapes of the Costa

• Deserts and gravel plains with very sparse vegetation
• River valleys as green islands with intensive agriculture
• Coastal hills with seasonal fog zones

Sierra: Highlands, Valleys, Altiplano

The Sierra consists of mountain ranges, plateaus, and basin landscapes. Many valleys have mild microclimates and allow for diverse forms of cultivation, while higher altitudes are more characterized by pastoral farming and robust crops.

The daily rhythm often follows a clear logic: strong sun exposure during the day, rapid cooling in the evening. Even short distances can mean long travel times due to passes and gorges.

The South and the Altiplano

In the south lies the Altiplano with high altitudes and wide plains. A prominent point is Lake Titicaca on the border with Bolivia. The combination of altitude, water surface, and traditions makes the region culturally and scenically particularly significant.

Selva: Amazon Region and Biodiversity

The Selva occupies a large part of the country and is one of the most biodiverse areas on Earth. Rainforest, rivers, tributaries, oxbow lakes, and seasonally flooded forests create a dense mosaic of habitats. Numerous indigenous communities live there with their own languages, knowledge systems, and ways of utilizing nature.

Its importance extends far beyond Peru, as water balance, carbon storage, and regional weather processes are strongly linked to large forest areas. Pressure arises from infrastructure, illegal logging, mining, and oil spills, which can affect individual river sections and fish stocks.

Rivers and Water Systems

Peru's water generally follows three drainage directions: to the Pacific coast, into the Amazon basin, and into closed highland basins. The largest portion of the area drains towards the Atlantic via the Amazon system.

Amazon System in Peru

Several Peruvian rivers form the headwater system of the Amazon. The Ucayali, fed by large Andean rivers, plays an important role as a headwater. The confluence of the Ucayali and Marañón is often considered the beginning of the Amazon in Peru, while the question of the most distant source is answered differently depending on the definition.

Rivers of the Costa

Many coastal rivers have highly fluctuating water levels seasonally. High demand comes from cities and irrigated agriculture. Consequently, reservoirs, canals, and efficient distribution are particularly important in dry years.

Climate by Region

Peru's climate heavily depends on altitude, proximity to the sea, and exposure. Three simple guidelines help in classification: dryness on the coast, altitudinal zones in the Andes, warmth and humidity in the Amazon region. A single day of travel can combine very different weather types, such as cool coastal fog, sunny highlands, and humid tropical air.

Costa

• Very low precipitation in many sections
• Frequent fog, especially near the coast
• Strong dependence on Andean water for agriculture

Sierra

• Temperature decrease with increasing altitude
• Large differences between sunny and shaded slopes
• Rainy and dry seasons vary by region

Selva

• High humidity and frequent precipitation
• Rivers as central transportation and livelihood arteries
• Seasonal flood periods in many lowland areas

Natural Highlights

Lake Titicaca

Lake Titicaca lies at an altitude of approximately 3,810 meters and is one of the world's highest navigable lakes for larger ships. Its location in the Altiplano shapes the climate, culture, and landscape around Puno on the Peruvian side.

Nazca Lines

The Nazca Lines are located in a very dry coastal desert and consist of large-scale geoglyphs. Their exceptional preservation is closely linked to the arid climate and the delicate soil surface.

Colca Canyon

The Colca Canyon in the Arequipa region is one of the deep canyon systems of the Andes. Large elevation differences, terraced fields, and condor viewpoints make the valley a well-known landscape.

Huascarán and the Cordillera Blanca

Huascarán, at 6,768 meters, is the highest point in Peru. Glaciers, lagoons, and steep ridges characterize the Cordillera Blanca, while the retreat of ice masses is visible in many places.

Current Issues

Protection of the Nazca Zone

In June 2025, a previously reduced protection zone around the Nazca Lines was reinstated. A technical working group is to further develop a robust zoning and management concept based on expert studies.

Rights of Rivers in the Amazon Region

In the Peruvian Amazon region, court decisions and local initiatives are increasingly drawing attention, as river ecosystems are to be more strongly protected legally. A focus is on pollution risks from oil and mining along individual tributaries.