Gruinard Island is a small, oval-shaped Scottish island approximately two kilometres long by one kilometre wide, located in Gruinard Bay, about halfway between Gairloch and Ullapool. At its closest point to the mainland, it is about one kilometre offshore. In 1942, the island became a sacrifice zone, and was dangerous for all mammals after military exp…Gruinard Island is a small, oval-shaped Scottish island approximately two kilometres long by one kilometre wide, located in Gruinard Bay, about halfway between Gairloch and Ullapool. At its closest point to the mainland, it is about one kilometre offshore. In 1942, the island became a sacrifice zone, and was dangerous for all mammals after military experiments with the anthrax bacterium, until it was decontaminated in 1990.