Between Tucson and the Navajo Nation, SR 77 passes through Oro Valley, Oracle, Mammoth, Winkelman, Globe, Show Low, Snowflake and Holbrook, as well as passing through the Fort Apache Indian Reservation and a tiny corner of the San Carlos Apache Indian Reservation.

Between 1938 and 1992, the route was slowly re-routed and extended in increments, to its current termini in Tucson and at the Navajo Nation boundary.

State Route 77 (SR 77) begins at a diamond interchange with Interstate 10 (I-10) Exit 255 in Tucson.

West Miracle Mile ends at an intersection with Oracle Road, where SR 77 turns north past the Tucson Mall.

SR 77 continues north, passing by the Central Arizona College Aravaipa Campus and Arizona College of Technology, proceeding through Dudleyville into Winkelman, where SR 77 crosses over the Gila River, next to the old Winkelman Bridge.

SR 77 continues north through town, then parallels the western bank of the Gila River to the northeast.

SR 77 turns northeast and runs concurrently with US 60 out of Globe, entering the Salt River Canyon, briefly entering the San Carlos Apache Indian Reservation before continuing into the Fort Apache Indian Reservation.

[4] SR 77 continues due north through the communities of Shumway and Taylor, becoming Main Street in Snowflake.

[6] The highway originally ran from a junction with SR 73 in McNary to U.S. Route 66 (US 66) in Holbrook via Show Low.

From Cutter, SR 77 was extended further south along a newly acquired state highway to a southern terminus with US 80/US 89 in Oracle Junction.

[8] While Miracle Mile and the northern segment of Oracle Road were renumbered as an extension of SR 77, the remainder of I-10 Business and US 89 between the intersection of Oracle Road and Miracle Mile and the interchange with I-10 and I-19 Business were not given to another route and was retired as a state highway, being handed over to the city of Tucson on October 15, 1993.

He explained that in 1936, real estate developer Stanley Williamson conceived the idea of creating a commercial center outside of the over-congested downtown retail district, in Tucson.

Ross originally called his business area the Wilshire Boulevard Center; it was changed to the Miracle Mile in 1928.