Long Island is an island in Fiordland, in the southwest of New Zealand's South Island. It lies within Dusky Sound, to the southeast of Resolution Island, and is separated from it and the South island mainland by Bowen Channel to the north, and from the South Island mainland by Cook Channel to the south. Long Island is almost in size, but distinctively narrow at in length and a maximum of in width. The island is part of Fiordland National Park and is the fourth-largest island in the park with no possums present. See also Desert island List of islands References Reed New Zealand Atlas (2004). Auckland: Reed Books. Map 104. Uninhabited islands of New Zealand Islands of Fiordland Fiordland National Park