State Route 78 (Arizona–New Mexico)

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State Route 78 marker State Road 78 marker

Arizona State Route 78 and
New Mexico State Road 78
Route 78 highlighted in red
Route information
Maintained by ADOT & NMDOT
Length: 34.68 mi (55.81 km)
19.47 mi (31.33 km) in Arizona[1]
15.213 mi (24.483 km) in New Mexico[2]
Existed: 1938-1959 – present
Major junctions
West end: US 191 / SR 75 in Three Way, AZ
East end: US 180 near Cliff, NM
Highway system
  • State Roads in New Mexico
SR 77 AZ SR 79
NM 77 NM NM 80

Arizona State Route 78 and New Mexico State Road 78 (SR 78) are a pair of adjoining state highways located in eastern Arizona and western New Mexico linking U.S. Route 191 (US 191) and Arizona State Route 75 near Greenlee County Airport to US 180 northwest of Cliff, New Mexico. It is also known in its Arizona stretch as Mule Creek Road.

Route description[edit]

The western terminus of SR 78 is located at a junction with US 191 and SR 75 at Three Way, Arizona near Greenlee County Airport. The highway heads northeast from this intersection along Mule Creek Road. There are a few hairpin turns along this stretch of highway as it follows the surrounding terrain.[1][3] State Road 78 heads eastward through desert, passing through the community of Mule Creek, New Mexico. The road continues eastward until terminating at U.S. Route 180 northwest of Cliff, New Mexico.[4]


The highway in Arizona was designated as SR 78 in 1924.[5] Its counterpart in New Mexico was marked as New Mexico State Road 78.[6] By 1938, it was still just a gravel road as were many roads in the area including US 666.[7] It would remain a gravel road in 1961. The other state highways in the area were paved by this time including the majority of its counterpart in New Mexico.[8] By 1971, nearly the entire highway had been paved with the exception of a portion near the New Mexico border.[9]

SR 78 in New Mexico was designated along its current route in the mid-1930s. It was extended to U.S. Route 60 via Mogollon by the mid-1940s and truncated to its present alignment in 1988.[10]

Junction list[edit]

State County Location mi km Destinations Notes
Arizona Greenlee Three Way 0.00 0.00 SR 75 / US 191 south – Safford, Duncan, Clifton Western terminus; road continues as US 191 south
ArizonaNew Mexico line
New Mexico Grant 15.213 24.483 US 180 – Glenwood, Silver City Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]


  1. ^ a b c Arizona Department of Transportation. "2006 ADOT Highway Log" (PDF). Retrieved 2008-04-09. 
  2. ^ a b New Mexico Department of Transportation. "New Mexico Department of Transportation State Road Log" (PDF). Retrieved 2010-12-08. 
  3. ^ Google (2008-04-23). "overview map of SR 78" (Map). Google Maps. Google. Retrieved 2008-04-23. 
  4. ^ Google (2010-12-08). "Overview map of State Road 78" (Map). Google Maps. Google. Retrieved 2010-12-08. 
  5. ^ Arizona Department of Transportation. "ADOT Right-of-Way Resolution 1959-079". Retrieved 2008-05-05. 
  6. ^ Auto Road Map of Arizona and New Mexico (Map). Rand McNally. 1927. Retrieved 2008-05-05. 
  7. ^ Road Map of Arizona and New Mexico (Map). Rand McNally. 1938. Retrieved 2008-05-05. 
  8. ^ Road Map of Arizona (Map). Rand McNally. 1961. Retrieved 2008-05-05. 
  9. ^ Road Map of Arizona (Map). Arizona State Highway Department. 1971. Retrieved 2008-05-05. 
  10. ^ Rimer, Steve. "New Mexico Highways 76-100". The Unofficial New Mexico Highways Page. Retrieved 8 December 2010. 

External links[edit]

Route map: Google

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