Arizona State Route 66

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State Route 66

SR 66 highlighted in red
Route information
Maintained by ADOT
Length66.59 mi[1] (107.17 km)
HistoryPreviously US 66
 Historic Route 66
Major junctions
West end Future I-11 / I-40 / US 93 in Kingman
East end I-40 in Seligman
CountryUnited States
Highway system
  • Arizona State Highway System
US 66 SR 67

State Route 66 (SR 66) is a surface road in the U.S. state of Arizona in Mohave and Coconino Counties. In 1914, the road was designated "National Old Trails Highway" but in 1926 was re-designated as U.S. Route 66.[2] In 1985, U.S. Route 66 was dropped from the highway system. Parts of the highway were either absorbed into I-40, turned over to the state (SR 66), or turned over to Yavapai County.

Route description

State Route 66 is a relic of the former U.S. Route 66 in Arizona and is the only part of old US 66 in Arizona to have state route markers. Its western terminus is near Kingman at exit 52 on Interstate 40 and its eastern terminus was near Seligman at exit 123 on Interstate 40. In 1990, the state turned over the easternmost 16.8 miles (27.0 km) of SR 66 (known as Crookton Rd) to Yavapai County for maintenance.[3]

State Route 66 tends downward toward the west, with the vegetation becoming more desert-like toward Kingman. The terrain changes at a slower pace than the more direct Interstate 40, making it a scenic alternative at the cost of some time. It still serves communities that the freeway avoids, including Valentine and Peach Springs; it enters the Hualapai Indian Reservation.


U.S. Route 66 in Arizona

U.S. Route 66 (now State Route 66) west of Seligman, Arizona

Between the California state line and Kingman, the original alignment is now known as Oatman Road and passed through the old mining town of Oatman. A later alignment (via Yucca) is now Interstate 40. The older alignment passes through the Black Mountains complete with numerous hairpin turns. This area is desert.

From Kingman to Seligman, it took a path now followed by modern State Route 66.

East of Seligman and continuing beyond Flagstaff, the area is mountainous (not desert) and covered with pine forests. Continuing toward the New Mexico state line, much of US 66 has been replaced with I-40. Various stretches of the old highway exist as frontage roads and business loops of I-40.

State route

In 1984, US 66 was officially removed from the state highway system of Arizona. Most of the old highway had been replaced by I-40, but the portion between Kingman and Seligman where I-40 followed a new alignment to the south became SR 66.[4] In 1990, the state turned over the easternmost 16.8 miles (27.0 km) of SR 66 (known as Crookton Rd) to Yavapai County for maintenance.[3]

Junction list

Historic US 66 west (Andy Devine Street)
Continuation beyond western terminus
I-40 / US 93 – Needles, KingmanWestern terminus of SR 66; exit 53 on I-40
CoconinoNo major intersections
YavapaiNo major intersections
county line
Historic US 66 east
End state maintenance
SR 66 designation continues to I-40 in Seligman
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
  •       Route transition


  1. ^ Arizona Department of Transportation. "2008 ADOT Highway Log" (PDF). Retrieved 2008-05-05.
  2. ^ National Old Trails Highway Archived 2013-12-07 at the Wayback Machine- Retrieved 2012-02-11
  3. ^ a b Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1990-07-A-053". Retrieved 2008-05-05.
  4. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1984-10-A-065" (PDF). Retrieved 2008-05-05.
  5. ^ Arizona Department of Transportation (2009). "State Highway System Log" (PDF). pp. 167–170. Archived from the original (PDF) on March 4, 2016. Retrieved February 25, 2012.

Further reading

  • Miller, Blue (2021). Abandoned Route 66 Arizona: Where the Road Came to an End. America Through Time (Fonthill Media). ISBN 978-1634993043.

External links