Wallace Line Wallace Line The Wallace Line or Wallace's Line is a faunal boundary line drawn in 1859 by the British naturalist Alfred Russel Wallace and named by English biologist Thomas Henry Huxley, that separates the ecozones of Asia and Wallacea, a transitional zone between Asia and Australia. West of the line are found organisms related to Asiatic species; to the east, a mixture of species of Asian and Australian origin is present. Wallace noticed this clear division during his travels through the East Indies in the 19th century. The line runs through Indonesia, between Borneo and Sulawesi (Celebes), and through the
Wallace, Idaho the Montana state line. East of Wallace, the "Route of the Hiawatha" (rails-to-trails) and the Lookout Pass ski area are popular with locals and tourists. Wallace came into being on a river plain where four streams and five canyons converge onto the course of the South Fork. The earliest known white interest in the area was the construction of the Mullan Road, which followed the South Fork from near Cataldo almost to the pass that crossed into Montana. John Mullan did observe promising quartz outcroppings along their route when he passed through in late 1859. However, he later frankly stated