The Yellowstone Trail began in South Dakota in 1912.  It quickly expanded to run from the Twin Cities (Minnesota) to the Yellowstone National Park in Montana. While the intent of the founders was to create a highway from coast to coast the marking of the whole route took considerable time.  In 1914  it was formally extended to the Idaho border in the west and to Chicago in 1915.  By 1917 the entire route was firmly established.

Choose the state of interest from the list to the left.  Only the some of the states have been developed in this web site.

Drafts of most of the detailed maps of the Yellowstone Trail are complete but carefully checked final versions are not ready for publication.  If you have specific questions about the route of the Trail in a reasonably local area, please write to us at