Route 501 Bus./US 701 Truck/SC 90 Truck in the census designated place (CDP) of Red Hill.

After turning to the east again, outside of Red Hill, the density of houses lining the road decreases.

Major roads that SC 90 intersects include International Drive (providing a connection to Robert Grissom Parkway in Myrtle Beach) and Old Reaves Ferry Road (providing a connection with SC 905).

The highway curves to the southeast at S-Hwy 57 where it heads through open space and farmland.

It reaches an intersection with Robert Edge Parkway (unsigned SC 31 Conn.) near North Myrtle Beach.

The intersection marks the western terminus of the parkway and is the entrance to the North Myrtle Beach Sports Complex.

For its final one mile (1.6 km), SC 90 passes many businesses before curving to the north and ending at an intersection with US 17.

In the late 1930s, SC 90 underwent several extensions in Marion County, before being truncated in 1952 to its present-day endpoint in Conway.

Just past the point where the river bent away from the highway, the alternate route curved to the south-southeast.