SH-77 then heads north–northwesterly for roughly seven and a half miles (12.1 km) until it enters the Magic Valley reginoon of Idahoa and then reaches the city of Albion.

After crossing that road, SH-77 heads north along 850 East for about 4 miles (6.4 km) until it reaches the city of Declo.

On the northern edge of the main part of the city, SH-77 crosses SH-81, the same highway that has a common southern terminus with SH-77.

After about 2.3 miles (3.7 km) SH-77 nears the southern bank of the Snake River and then jogs very brielfy to the east before continuing north again to quickly reach its northern terminus at a diamond interchange with I-84 (Vietnam Veterans Memorial Highway)/US 30 and SH-25.

SH-77 Spur then heads northerly for roughly 4.7 miles (7.6 km) to reach the unincorporated community of Elba.

Just south of the central part of Elba, SH-77 Spur resumes a northeasterly, heading quickly leaving the community.

After about 4 miles (6.4 km) along the northeasterly heading, and running roughly parallel with and then crossing over Cassia Creek, SH-77 Spur reaches it northern terminus at a T intersetion with SH-77 in Connor.