Sierra Negra is the great volcano of southern Isabela, and hiking to its rim is the standard outing for anyone who sleeps in Puerto Villamil. The caldera is about ten kilometres across, one of the largest in the world, and the crater floor is a wide, flat expanse of dark lava and ash, so big that people on the far side look like specks. Tours leave from town in the morning by vehicle, climb into the cool, damp highlands where farms give way to scrub and mist, and then follow a track on foot along the crater rim. Many guided tours continue past the rim along the northern side towards Volcán Chico, a smaller vent where the landscape turns into an orange and grey moonscape of sulphur-stained rock and fresh lava. The walk is long, usually in the region of five to six hours in total including driving, and it rewards early starts, since the rim can be cloudy by midday. The volcano is active; its last eruption was in 2018, and the lava from it is still visibly dark and unweathered on parts of the route. Guides explain the geology and point out the Darwin finches and vegetation that cling to the slopes. It is a serious day out, not a stroll, but it is straightforward for anyone with reasonable fitness and the right shoes.
What the day feels like
The climb is gradual and the track is well worn, so the effort is mainly time on your feet and the heat when the cloud clears. The rim walk is level for long stretches, with the vast crater on one side and, on a clear morning, the coast and the sea stretching away on the other.
The weather in the highlands is its own thing. Mist and light drizzle are common, especially from June to November in the cooler season, and the view can open and close within minutes, so patience pays. The garúa, as the local drizzle is called, is also what keeps the highlands green.
Planning
Wear closed shoes with grip, long trousers or leggings, a light rain jacket, a hat and sunscreen, and carry water and snacks, because there is no shade and no shop on the route. Tours normally provide a guide, transport and often a packed lunch, but check what is included before you book.
The hike starts early to beat the clouds and the heat, so you will want a quiet evening before. Horseback options also exist from some operators for part of the route, which suits those who prefer not to walk the whole distance, though a walking tour gives the most freedom to stop and photograph.
Who it suits and what to know: it is excellent for active couples, adults and teenagers who want something that feels unlike a boat day. It is less suitable for small children or anyone with knee problems, because of the distance and the uneven ground. Treat the volcanic landscape with care, stay on the marked track and carry out everything you carry in.
If you are visiting Isabela only on a day trip from Santa Cruz, you will not have time for Sierra Negra, so plan to stay at least one night in Puerto Villamil and combine the hike with a snorkel or a visit to the Tintoreras islet the next day.
What to expect
The experience
A guided drive into the Isabela highlands followed by a walk along the rim of the Sierra Negra caldera and, on many tours, on towards Volcán Chico.
Best time
Early morning, before cloud and heat build; clear mornings in the warmer months give the widest views.
How long
Roughly five to six hours in total including the drive, with several hours of walking.
Tips
Wear sturdy closed shoes and a rain layer, carry water and snacks, and stay on the marked track.
Quick picks
- Best for
- Active travellers who want a volcano walk and a landscape unlike any other in the Galápagos.
- Families
- Suitable for fit teenagers; young children may find the distance and heat hard.
- Couples
- A memorable shared adventure, followed by a swim or a relaxed dinner in Puerto Villamil.
- Pair with
- A Tintoreras islet snorkel or the flamingo lagoons around Puerto Villamil on another day.
- Time needed
- A morning to early afternoon; stay at least one night on Isabela.
Good questions
How big is the Sierra Negra caldera?+
It is roughly ten kilometres across, one of the largest volcanic calderas in the world, and the walk along its rim gives a sense of the scale.
Is Sierra Negra active?+
Yes. It last erupted in 2018, and parts of the route cross dark, relatively fresh lava. Guides follow park rules and current advice.
How hard is the hike?+
It is long rather than steep, with several hours on foot over uneven ground. Reasonable fitness, sturdy shoes and water are all you need.
Can I do it as a day trip from Santa Cruz?+
Not comfortably. The crossing and the hike together make a very long day, so stay at least one night in Puerto Villamil.
What should I wear?+
Closed shoes with grip, long trousers, a hat, sunscreen and a light waterproof, since the highlands can be misty and then suddenly hot.
