Highway 20 was designated a federal highway in 1926, and until the
arrival of the Interstate Highway System in the 1950s it was a primary
route across northern Wyoming. From the Great Plains in the east to the
mountains in the west, Highway 20 passed though cities and towns that
retain their frontier visages and such wonders as Hell's Half Acre, the
Wind River Canyon, Natural Hot Springs, Buffalo Bill Scenic Byway, and
spectacular Yellowstone National Park. Fortunately, historic Highway 20
remains almost completely intact and can be driven much as travelers did
in years past. Postcard History Series: Along Wyoming's Historic Highway
20 celebrates this trip, illustrated by more than 200 vintage postcards
showing the personality of the road. Not to be forgotten are the tourist
courts, hotels, diners, and gas stations that made automobile travel
possible.