US Route 20

U.S. Route 20 is an east–west United States highway. As the “0″ in its route number implies, U.S. 20 is a coast-to-coast route; however, because national park roads do not have signage for U.S. numbered highways, a gap exists through Yellowstone National Park and splits the route into two sections.

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Massachusetts, New York, Pennsylvania, Ohio, Indiana, Illinois, Iowa, Nebraska, Wyoming, Montana, Idaho, Oregon


Waltham, Springfield, Albany NY, Syracuse, Erie, Toledo, Chicago, Williams, Sioux City, Casper, Idaho Falls, Albany OR