Île Foch is one of the Kerguelen Islands

Kerguelen Islands

The Kerguelen Islands , also known as the Desolation Islands, are a group of islands in the southern Indian Ocean constituting the emerged part of the otherwise submerged Kerguelen Plateau. The islands, along with Adélie Land, the Crozet Islands and the Amsterdam and Saint Paul Islands are part of...

 situated near to the north coast of Grand Terre, the principal island.

It is separated from this main island only by a narrow sea arm, the Tucker strait. It borders île Saint-Lanne Gramont

Île Saint-Lanne Gramont

Île Saint-Lanne Gramont is an uninhabited island, the second largest island in the Kerguelen Islands, situated to the north of presqu'île de la Société de géographie, with an area of 45.8 km². It reaches 480 m at its highest point and is located at )...

 at the northwest, which is separated by the Baie de Londres. At the northeast point it borders Mc Murdo and Howe

Île Howe

Île Howe is one of the islands of the Kerguelen archipelago, situated to the north of île Foch, just after île MacMurdo. It is about 8 kilometres in length.- Sources :* *...

It is the second largest island in the archipelago (206 km²). The highest point is named la Pyramide Mexicaine, at 687 metres.

Protected area

Since it is the largest island in the archipelago with no introduced species (no rabbits, cats, mice or rats), Île Foch is used as a reference as to the original ecosystem of Kerguelen Island. To prevent any accidental introduction of species, access is highly regulated, restricted to scientific missions only.