The southern half of this road runs alongside the Gila River and the Copper Basin Railroad.

The road passes through or near the towns of Kelvin, Riverside, Kearny and Hayden.

This road passes by the copper mines in eastern Pinal County.

From Hayden, SR 177 heads towards the west-northwest before curving towards the northwest as it approaches the city limits of Kearny.

The highway continues heading northwest until it begins to near Superior, where it curves towards the north.