U. S. Highway 91


Idaho Falls, Idaho – Brigham City, Utah
Longest Mileage: 1468
Current Mileage: 163

Current U.S. 91 Route

U.S. 91 is one of the original 1926 highways. Its current route has been in place since 1974. The original northern terminus was Sweetgrass, Montana and the original southern terminus was Long Beach, California. U.S. 91 currently runs through 2 states on its north to south route.

  • Montana – Decommissioned
  • Idaho – 97 Miles
  • Utah – 70 Miles
  • Arizona – Decommissioned
  • Nevada – Decommissioned
  • California – Decommissioned