Ushuaia Penguin Tour to Martillo Island
A ushuaia penguin tour crosses the Beagle Channel to Martillo Island, a narrow gravel spit in the Tierra del Fuego archipelago where Magellanic penguins nest in burrows alongside a small colony of gentoos. Most ushuaia penguin tour tickets pair the crossing with a stop at Estancia Harberton, the region's oldest ranch and home to the Acatushún marine mammal museum. Guides from the Piratour concession lead the only landing permitted on the island, while catamaran operators offer a Beagle Channel penguin cruise that circles the shoreline from the water.
No boat may put passengers ashore on Isla Martillo without a concession. A single licensed operator, Piratour, walks small groups among the birds; every other vessel in the Beagle Channel must watch from the water.
That restriction shapes the modern ushuaia penguin tour more than weather, distance or season, and it is the reason the island still reads as a working colony rather than a viewing terrace.
Martillo is a low crescent of gravel, peat and tussock barely a kilometre long, set in the channel opposite Estancia Harberton. The estancia was founded in 1886 by Thomas Bridges, the Anglican missionary who compiled a Yámana–English dictionary of some thirty-two thousand entries, and it was the first estancia established in Tierra del Fuego, granted by the Argentine government. His son Lucas wrote Uttermost Part of the Earth from the same ground. The Museo Acatushún de Aves y Mamíferos Marinos Australes, built around Natalie Prosser Goodall's marine-mammal collections, stands beside the pier where boats leave for the island.
The colony is layered. Magellanic penguins dominate — several thousand breeding pairs excavating burrows into the peat, returning each spring to the same tunnels. Gentoos, which began nesting here in the early 1990s, build surface nests of pebbles and grass toward the eastern end. King penguins appear occasionally, standing a head taller and rarely breeding. The birds hold the island from October, when the first males come ashore, until April, when the last fledglings go to sea; the caminata con pingüinos, the ushuaia penguin walk sold across the city, exists inside that window and nowhere outside it.
Ushuaia penguin tour tours are, in practice, an instrument of research as much as of travel. Biologists have monitored breeding success on Martillo for decades, and the marked path across the island follows their data rather than any sightline. Entry itself costs nothing — 0 ARS — but access is confined to authorized guided groups, and the daily number of walkers permitted ashore is capped. Nothing on the island has been built for visitors: no railing, no boardwalk, no shelter.
That austerity is the point. Among the Beagle Channel wildlife excursions and Tierra del Fuego landmarks that fill an Ushuaia itinerary, Martillo offers the least architecture and the longest continuity — a nesting ground that has functioned, undisturbed in its essentials, far longer than any ushuaia penguin tour tour has existed.
5 hr 30 min
