Michigan's Upper Peninsula, and Isle Royale in Lake Superior. This massive range, containing diverse habitats, contains four of the six North American subspecies. In the West, moose populations extend well north into Canada (British Columbia and Alberta), and more isolated groups have been verified as far south as the mountains of Utah and Colorado and as far west as the Lake Wenatchee area of the Washington Cascades. The range includes Wyoming, Montana, Idaho, and smaller areas of Washington and Oregon. Moose have extended their range southwards in the western Rocky Mountains, with initial sightings in Yellowstone National Park in 1868, and then to the northern slope of the Uinta Mountains in Utah in the first half of the twentieth century. This is the southernmost naturally established moose population in the United States. In 1978, a few breeding pairs were reintroduced in western Colorado, and the state's moose population is now more than 1,000.