Onekotan Island Kurils Russia
Russia

Onekotan Island, Kuril Islands | Cruise Port Guide

From the deck, you first think it is an illusion: a perfect volcano rises from the centre of a lake, itself set within the ramparts of an older volcano. Onekotan, an uninhabited island in the Northern Kurils, is home to one of the most striking geological curiosities in the Pacific, and expedition ships cruising between Kamchatka and Japan sometimes adjust their route to offer it to their passengers. No one lives here; the show belongs to the foxes, the seabirds and those passing through. The stop appears on only a few expedition itineraries.

A volcano within a volcano

The phenomenon that justifies the detour has two names, and they are worth remembering. Tao-Rusyr refers to the ancient caldera, an amphitheatre about seven and a half kilometres in diameter born of a cataclysmic eruption some 7,500 years ago, one of the most violent in the recent history of the Kurils. Its walls hold Lake Koltsevoye, the "ring lake," whose cold waters encircle Krenitsyn Peak: a 1,325-metre cone with regular slopes that rose from the depths of the caldera and is still active, its last eruption dating back to 1952. Seen from offshore or from the crater rim, the composition seems drawn with a compass, and onboard lecturers never tire of explaining how it works.

A port call to be earned

No pier, no village, no marked trail: Onekotan must be earned. Landings are made by inflatable boat on beaches of black sand or pebbles, only when the swell and fog allow, which is never a given in this part of the world. Groups best served by the weather set off, accompanied by guides, on the climb to the caldera rim through creeping alders and grassy tundra; the effort of several hours, in an increasingly mineral setting, is rewarded with a panorama very few eyes have seen. Others settle for a coastal walk, which is no second-rate consolation. Bring several layers of clothing, tall boots for wet landings and protection for your camera: here, the weather decides everything, and it changes its mind several times a day.

Life without people

The Ainu once frequented these shores to hunt and fish, and the island still bears a name from their language. A few families lived here intermittently, a Soviet post held on for a time, then the island was left to itself. What remains are red foxes, curious enough to come and inspect visitors, the whales and orcas encountered along the way, and cliffs where murres, tufted puffins and kittiwakes nest. At sea, groups of sea otters, dolphins and sea lions from the neighbouring islands complete a cold-latitude bestiary that you review in the evening, notebook in hand.

The lesson of the Kurils

The archipelago lines up its volcanoes over more than a thousand kilometres, between the Sea of Okhotsk and the Pacific, along one of the most active zones on the planet. Onekotan is its purest expression: here, no infrastructure stands between the traveller and the geology. For the duration of the port call, everyone becomes an explorer again, dependent on the wind, the fog and the sea, like the 18th-century navigators whose names, Krenitsyn first among them, have stayed attached to the charts.

The ship often pulls away at the end of the day, when the low light picks out the cone of Krenitsyn above its rampart. You stay on deck longer than planned. Inhabited islands offer souvenirs; uninhabited ones offer something else, a kind of privilege, and this port call hands it out with a generosity its low profile would never lead you to suspect.

Frequently Asked Questions

Yes, but nothing is assured. No pier, no village, no marked trail: landings are made by inflatable boat onto black sand or shingle beaches, only when swell and fog allow.
In the northern Kurils, between Kamchatka and the rest of the chain, in the Russian Far East. The island is uninhabited and can only be visited aboard expedition ships.
A volcano inside a volcano. From the deck you first take it for an illusion: a perfect cone standing at the centre of a lake, itself set within the walls of an older volcano. It is one of the most striking geological sights in the Pacific.
A basin roughly seven and a half kilometres across, formed by a cataclysmic eruption some 7,500 years ago, one of the most violent in the recent history of the Kurils. Its walls hold Lake Koltsevoye, the 'ring lake'.
The 1,325-metre cone rising from the depths of the caldera, with slopes so regular they look drawn with a compass. It is still active: its last eruption was in 1952.
When the weather cooperates, yes: the luckiest groups make the climb with the guides. It is not a stroll — there is no marked trail and the walk demands reasonable fitness.
Red foxes, curious enough to come and inspect visitors, cliffs where guillemots, horned puffins and kittiwakes nest, and at sea whales and orcas met along the way.
Only intermittently. The Ainu used these shores for hunting and fishing — the island still carries a name from their language. A few families lived here, a Soviet post held on for a time, then the island was left to itself.
In warm waterproof layers, with waterproof boots for the Zodiac landing. Fog and wind rule these waters even in summer, and a climb to the caldera calls for footwear that grips on loose ground.
During the summer season, roughly June to September, when expedition ships work between Kamchatka and the Kurils. Even within that window, swell and fog set the programme day by day.