Sierra Negra & Volcán Chico Hike – Isabela Island’s Volcanic Adventure
The Sierra Negra and Volcán Chico hike is one of the most dramatic and awe-inspiring experiences available in the Galápagos Islands. Sierra Negra is an active shield volcano with one of the largest calderas in the world — stretching 10 kilometers across and dropping 100 meters to a flat, steaming floor of ancient lava. Volcán Chico, a secondary vent on Sierra Negra’s northern flank, reveals even more recent volcanic activity: a surreal moonscape of multicolored lava fields, fumaroles, and craters that looks like something from another planet.
The Caldera — One of Earth’s Largest
Standing on the rim of Sierra Negra’s caldera is a humbling experience. At 10 km in diameter, it ranks among the five largest volcanic calderas on Earth. From the rim, you can see the entire caldera floor — a mosaic of different lava flows from eruptions spanning hundreds of years. The most recent major eruption was in 2018, and the caldera still occasionally emits sulfurous steam from active fumaroles. Your certified naturalist guide will explain the geology and the ongoing volcanic activity as you walk the rim trail.
Volcán Chico — A Lunar Landscape
From the caldera rim, the trail continues to Volcán Chico, where a series of satellite craters and fresh lava flows create one of the most otherworldly landscapes in the archipelago. The lava here ranges in color from jet black (pahoehoe lava) to deep red and green oxidized formations. On a clear day, the panoramic views from Volcán Chico extend across the western Galápagos — you can see Fernandina Island, the most volcanically active island on Earth, rising from the Pacific to the west.
Wildlife Along the Trail
- Galápagos giant tortoises — roaming freely in the highland vegetation zone
- Galápagos hawks — soaring above the caldera rim (endemic, fearless of humans)
- Darwin’s finches — multiple species in the transition and highland zones
- Short-eared owls — hunting in open lava fields during daylight hours
- Lava lizards — sunning on the warm black rock throughout the trail
Tour Itinerary
Your tour departs from Puerto Villamil and travels by bus approximately 9 km uphill through agricultural zones and humid highland forest to the trailhead at 900 m elevation. The hike to the caldera rim is approximately 2 km (45 minutes) through scalesia forest. After time at the rim, the trail continues to Volcán Chico (additional 3 km round trip). Total hiking distance is approximately 8–10 km with an elevation gain of 300 m. The return journey is the same route back to Puerto Villamil.
What’s Included
- Round-trip transport from Puerto Villamil to the trailhead
- Certified bilingual naturalist guide (Galápagos National Park certified)
- Galápagos National Park entrance fees
- Drinking water and snacks
- Trekking poles available on request
Practical Information
Duration: 6–7 hours total (including transport and hiking).
Difficulty: Moderate to challenging — good physical condition required. Suitable for ages 12+.
What to wear: Sturdy hiking shoes or boots, sun protection, lightweight rain jacket (highland weather changes rapidly), long trousers recommended for trail brush.
Best time: Morning departures offer cooler temperatures and clearer views before afternoon cloud cover builds.
Frequently Asked Questions
Is the volcano safe to visit?
Yes — Sierra Negra has erupted periodically (most recently 2018) but access is carefully managed by the Galápagos National Park. Your certified guide monitors all conditions and trails are only opened when activity levels are safe.
How difficult is the hike?
The trail to the caldera rim is a steady uphill walk (not technical). The extension to Volcán Chico adds distance over uneven lava terrain. Good walking shoes and moderate fitness are sufficient for most visitors.
