Arizona State Route 77

State Route 77
SR 77 highlighted in red
Route information
Maintained by ADOT
Length	253.93 mi[1] (408.66 km)
Existed	May 13, 1930–present
History	Part of the route is a former section of US 80 and US 89
Tourist routes	Copper Corridor Scenic Road[2] Historic US 80[3]
Major junctions
South end	I-10 in Tucson
Major intersections	US 70 in Globe US 60 from Globe to Show Low US 180 in Holbrook I-40 in Holbrook
North end	BIA Route 6 at Navajo Nation boundary
Location
Country	United States
State	Arizona
Counties	Pima, Pinal, Gila, Navajo
Highway system
Arizona State Highway System Interstate US State Proposed Former
← SR 76 → SR 78

State Route 77 (SR 77) is a 253.93-mile (408.66-kilometre) long state highway in Arizona that traverses much of the state's length, stretching from its southern terminus at a junction with I-10 in Tucson to its northern terminus with BIA Route 6 at the Navajo Nation boundary just north of I-40.

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 Globe and Show Low, SR 77 runs entirely concurrent with US 60. When it was originally commissioned in 1930, SR 77 only traversed the route between McNary and Holbrook. 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.