Caribou Island is a fictional island in the novel "Caribou Island" by David Vann. The story takes place in Alaska, where the island is located in the state's Kenai Peninsula. Caribou Island is a remote and isolated place, characterized by its rugged wilderness, dense forests, and a lake that surrounds the island. The island is uninhabited, offering a sense of solitude and escape from modern civilization. It serves as the backdrop for the novel's narrative, exploring themes of relationships, isolation, and the harsh realities of nature.