Arizona State Route 66

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. In 1984, 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 Crookston Rd) to Yavapai County for maintenance.
State Route 66 tends downward toward the west, with the vegetation becoming more desert-like toward Kingman. The terrain...