State Route 78 (Arizona–New Mexico)
Route 78 highlighted in red | |||||||
| Route information | |||||||
| Maintained by ADOT & NMDOT | |||||||
| Length | 34.68 mi (55.81 km)
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| Existed | 1938–present | ||||||
| Major junctions | |||||||
| West end | US 191 / SR 75 in Three Way, AZ | ||||||
| East end | US 180 near Cliff, NM | ||||||
| Location | |||||||
| Country | United States | ||||||
| State | Arizona | ||||||
| Highway system | |||||||
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Arizona State Route 78 (SR 78) and New Mexico State Road 78 (NM 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. The Arizona stretch is also known as Mule Creek Road.