Attraction Guide: Sierra Negra Volcano, Isabela Island, Ecuador

Sierra Negra Volcano Guide

Sierra Negra: Hike into the Second Largest Caldera on Earth Guide

Sierra Negra Volcano, located on Isabela Island, is a must-see for any visitor to the Galapagos. This active shield volcano boasts the second-largest caldera in the world, measuring an impressive 10 kilometers in diameter. A hike to the rim of the caldera offers breathtaking panoramic views of the surrounding landscape, including the volcanic terrain, lush vegetation, and distant coastline. The sheer scale of the caldera is truly awe-inspiring and provides a unique perspective on the volcanic forces that shaped the Galapagos Islands. Sierra Negra has a history of volcanic activity, with the most recent eruption occurring in 2018. The volcano's formation is a result of the Galapagos hotspot, a plume of magma rising from deep within the Earth's mantle. Over millions of years, this hotspot has created a chain of volcanic islands, with Isabela being one of the youngest and most volcanically active. The caldera itself was formed by a series of collapses following large eruptions, leaving behind the massive depression we see today. The primary activity for tourists is hiking to the rim of the caldera. The hike is moderately challenging, taking approximately 3-4 hours round trip. The trail passes through diverse landscapes, from barren volcanic terrain to lush forests. Along the way, you'll have the opportunity to observe unique flora and fauna, including Darwin's finches and various plant species adapted to the volcanic environment. Some tours also include a visit to Volcan Chico, a parasitic cone on the flank of Sierra Negra, where you can witness active fumaroles and sulfur vents. While not directly related to the volcano, local restaurants in Puerto Villamil offer traditional Ecuadorian cuisine, often featuring fresh seafood and locally grown produce.