The entire route was within 15 miles (24 km) of Council Bluffs and downtown Omaha, Nebraska.

Iowa 370 was a short route, just over three and a quarter miles (5.2 km) in length.

The highway cut through farmland shaped by the meandering river's course.

Designated in 1953, Iowa 370 originally extended 5.5 miles (8.9 km) from Bellevue, Nebraska, to US 275.

[3] Upon completion and opening of the new US 34 bridge over the Missouri River, Iowa 370 was turned over to Mills County.