The highway begins at a diamond interchange on I-15 heading east and quickly turns north into Main Street.

After leaving town to the north, the route turns back to the west and ends at another diamond interchange with I-15.

At the same time, State Route 161 was also created, serving a similar purpose, but on the interchange 1 mile (1.6 km) north of Beaver.

When I-15 was completed north of town in 1964, SR-1 was rerouted as it left Beaver to connect with the new interstate, following the same route as SR-161.

As a result, SR-160 was extended northward to follow the former route of SR-1 along main street north through town, then turning northwest to the interchange at I-15.