Isabela island: volcanoes, penguins, and the wild west of Galápagos

Isabela is the biggest island in Galápagos: 120 km long, shaped like a seahorse, and built from six volcanoes that fused together, five of which are still active. It holds the archipelago’s penguin strongholds, its biggest tortoise population, and a string of visitor sites no other island can match for raw geology. It is also, with Santa Cruz and San Cristóbal, one of the three islands you can visit land-based. This page covers both ways.

Key facts

• Largest island in the archipelago, formed by six shield volcanoes: Ecuador, Wolf, Darwin, Alcedo, Sierra Negra and Cerro Azul. All are active except Ecuador.
• Wolf Volcano, on Isabela, is the highest point in all Galápagos.
• Charles Darwin visited in 1835 on the Beagle.
• Its small human population (over 1,750 by one count) lives mostly in Puerto Villamil on the south coast, a fishing town that only opened a small runway for light aircraft in 1996 and barely felt tourism until the 1990s.
• Access: no mainland flights land here. You arrive by inter-island ferry from Santa Cruz (07:00 and 15:00, 2 to 2.5 hours, $50 per leg for tourists) or on a cruise. Emetebe’s small planes connect Baltra, San Cristóbal and Isabela, but only from within the archipelago.

Getting there

The ferry is the normal route, with Puerto Ayora as the mandatory hub. Two things catch visitors: entering Isabela costs an additional local fee of $10 for foreigners at the dock, and the town has no ATM that reliably serves foreign cards, so bring cash from Santa Cruz. Our ferry guide covers schedules and the water taxi detail.

The visitor sites, and what you can do at each

Sierra Negra volcano

The day trip that defines the island. Sierra Negra is Isabela’s oldest volcano, and its caldera, more than 6 miles across, is the second largest in the world. From Puerto Villamil it is a drive up to the trailhead and then a roughly 15 km round hike (half a day) along the rim; guided tours run around $30 to 50. Fit groups push on to Volcán Chico, a parasitic cone whose last eruption in 1979 left fresh black flows you can walk across, with views over the rest of Isabela and across to Fernandina. Bring real water and a windbreaker: the rim sits in cloud more often than not.

Los Tuneles

A labyrinth of lava arches and bridges half-sunk into a calm turquoise bay, and our honest pick for the best snorkeling day on Isabela: seahorses are the star (this is the archipelago’s best place to find them), plus whitetip reef sharks resting in the channels, sea turtles, penguins and rays. Conditions are unusually protected by the lava roof, which is why it suits mixed-ability groups. Access is by boat tour from Villamil only.

Las Tintoreras and Concha de Perla

Las Tintoreras is a chain of islets in the bay in front of town, named for the whitetip sharks that pack the narrow channels (tintorera is the local name for the shark). A short walk over lava passes marine iguana piles and penguin sightings are frequent; note that swimming is prohibited on one of its two beaches. Concha de Perla, a shallow lagoon beside the Villamil dock, is free to enter and one of the few official snorkel spots you can visit on your own without a tour.

The wetlands, the Wall of Tears and the breeding center

A boardwalk network links the salt lagoons behind Villamil beach (the only place on the planet where all four native mangrove species grow together) with flamingos, pintail ducks and the mangrove finch, one of the rarest birds on earth and found only here. From there a flat path or bike ride continues 6 km to the Muro de las Lágrimas, the Wall of Tears: a lava-block wall built by prisoners of the island’s penal colony (operating 1944 to 1959) over more than 14 years, nearly 20 ft tall in places. The Arnaldo Tupiza tortoise breeding center, a short walk from town, keeps five of Isabela’s native tortoise lineages and sits within the site caps the park sets for breeding centers.

By boat from the west: the cruise-only ring

The west side of Isabela is where Galápagos gets strange, and it is realistically cruise-only territory because there is no land infrastructure. Punta Vicente Roca, two coves cut into a tuff cone at the foot of Volcán Ecuador, is the classic site for sunfish, the heaviest bony fish in the ocean, plus flightless cormorants and fur seals on panga rides; there is no landing. Elizabeth Bay is panga-only too, gliding past the Marielas islets with penguins on the rocks and rays and turtles in the mangrove channels (kayaking is prohibited here by the park). Punta Moreno is a 2.1 km hike over bare lava with brackish coastal lagoons where flamingos feed; Tagus Cove is the historic anchorage where whalers and pirates scrawled ship names on the cliffs since the 1800s, with a short steep trail up to the saltwater Darwin Lake; and Urbina Bay marks the 1954 uplift that raised 6 km of seabed and pushed the coast out three-quarters of a mile overnight, leaving coral heads stranded inland along a 3.2 km trail, plus land iguanas and giant tortoises. Off Cape Marshall, north-east Isabela, giant manta rays gather in such numbers that divers call it the “Manta City”.

Wildlife highlights

Isabela holds most of the world’s roughly 2,000 Galápagos penguins (95% of the population concentrates on Isabela and Fernandina) and the flightless cormorant, of which only about 1,600 adults remain, lives here and on Fernandina alone. The biggest marine iguanas in the archipelago, the largest giant tortoise population (the Wolf Volcano population counts 7,000 to 8,000 animals, the biggest of any species in the islands), flamingos in the wetlands, and 16 whale species recorded offshore including Bryde’s, humpbacks and orcas, best June to November in the cold Humboldt season. Inland, the pink land iguana lives on Wolf Volcano, but its habitat is closed to tourism: only researchers may enter.

Cruise or land-based?

Both, and they show you different islands. Land-based Isabela means Villamil: days built around Los Tuneles, Tintoreras, the Sierra Negra hike and free biking to the Wall of Tears. It is the most relaxed of the three towns. Cruises, especially western itineraries, are the only way to see Vicente Roca, Elizabeth Bay, Moreno, Tagus and Urbina, and the west is where the penguins and cormorants concentrate; our cruise vs land guide explains the trade in detail.

Fixed costs are the same either way: $200 park entry for foreign adults and the $20 transit card, both in the entry fee guide. Budget for the $10 Isabela dock fee and cash for everything, since there are no working foreign-card ATMs.

Who Isabela is for

• Active travelers: the Sierra Negra hike is the best volcano walk you can do as a day trip in Galápagos.
• Snorkelers: Los Tuneles for seahorses, Concha de Perla for sharks and penguins without a boat.
• Wildlife obsessives chasing penguins and flightless cormorants, though for those two species specifically, a cruise into the west is the surer bet.
• Slow travelers: Villamil’s long white beach, the wetlands and cheap local food make it the easiest island to do nothing on for a few days. If you are fitting it into a bigger trip, our how many days guide covers the two-to-three-island timing.

Last verified: September 2026