United States Highway 91 is a north-south United States highway. A long-haul route until the mid-1970s, it has now been largely decommissioned in favor of Interstate 15 -- in fact, half of its remaining 120 mile (193 km) length is within a short distance of the Interstate.

Termini

As of 2004, the highway's northern terminus is in Idaho Falls, Idaho at an intersection with U.S. Highway 26 (and Business Interstate 15). Its southern terminus is in Brigham City, Utah at an intersection with Interstate 15, after spending 10 miles multiplexed with U.S. Highway 89.

Historic termini

At its peak, from 1947 to 1965, US 91 extended from the Canadian border north of Shelby, Montana to the Pacific Ocean at Redondo Beach, California.

States traversed

The highway passes through the following states:

• Montana (until 1973)
• Idaho
• Utah
• Arizona (10 miles (16 km) in the northwest corner, until 1974)
• Nevada (until 1974)
• California (until 1973)

See also:

• California State Route 91
• Interstate 15

Related US Routes

• U.S. Highway 191
• There has never been a US Highway 291 or 391
• U.S. Highway 491
• List of U.S. Highways

Sources and external links

• Endpoints of US highways (used with permission)
• Photographic virtual tour of U.S. Highway 91.