John Mullan's celebrated road, a 625-mile link that connected the Missouri and Columbia rivers and eventually became a significant component of Interstate 90, established the West Point graduate as an accomplished engineer. After completing the West's first highway, he lived for nearly another half century, a period of dynamic change.


Idaho State Historian Keith Petersen takes a fresh look at the dashing young soldier/explorer--probing his complex personality and continuing a story that includes business partnerships and personal relationships with some of the West's most intriguing characters.

John Mullan

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    Nez Perce County Museum

    0306 3rd Street 

    Lewiston, Idaho 83501


    Hours: Tuesday - Saturday 10am-4pm

    © 2021 by Nez Perce County Historical Society and Museum