The Tongass is one of the few old-growth temperate rainforests in the world and America’s largest national forest. Its towering stands of 700 year old trees provide vital habitat for bears, salmon, Sitka black-tailed deer, goshawks, and—importantly—the rare and dwindling Alexander Archipelago wolf. The U.S. Fish and Wildlife Service recently found that, because of excessive old-growth logging, this unique subspecies of wolf may warrant listing under the Endangered Species Act.