The road is located entirely in Twin Falls County.

State Highway 74 begins at a junction with U.S. Route 93 southwest of Twin Falls.

The highway heads east through some farmland as E 3600 N, turning north to N 2900 E near the Magic Valley Regional Airport.

The highway terminates at an intersection with 2nd Avenue, which carries U.S. Route 30 through downtown Twin Falls.

[2][3] The entire route is in Twin Falls County.