Roadside highway turnout - Rest Area - View Area Dawson City northern limits Photo taken from view area of turnout. The sign text states. Home of the Fortymile caribou herd. The hills around you are home to the Fortymile caribou herd. These migratory barren-ground caribou are smaller than the woodland caribou and they travel long distances between their winter and summer ranges. At one time as many as 500,000 caribou covered these hills from late summer to spring. The herd returned west in May to its calving grounds in Alaska. In the 1930s the Fortymile herd ranged across the Central and Southern Yukon. It wintered mainly in the Dawson Range (south Carmacks) and caribou were reported as far south as Lake Laberge, near Whitehorse, in the summer of 1936/37. If the Fortymile herd ever returned to this area in great numbers the Top of the World Highway will provide excellent viewing opportunities. Yukon Top of the World Highway The Top of the World Highway, Connects Dawson City in the Yukon Territory with the Alaska, USA border, where it joins the Taylor Highway (Alaska highway #5) west to Chicken and Tetlin Junction & the Alaska Highway.