The section of US 89 located between US 12 and US 87 is known as the Kings Hill Scenic Byway, which passes through the Little Belt Mountains in the Lewis and Clark National Forest,[2] and is home to a wide variety of wildlife and provides many recreational opportunities for travelers along the route.

[3] From US 12 the byway travels for 71.4 miles (114.9 km) through the Lewis and Clark National Forest, through the communities of Neihart and Monarch, and on to its junction with US 87.

The route offers access to the Showdown Ski Area and Sluice Boxes State Park.

The route travels over the Kings Hill Pass which snow removal crews work to keep open throughout the winter season.

US 89 travels 6.2 miles (10.0 km) to its northern terminus at the Canadian border at Port of Piegan where the road continues into Alberta as Highway 2 towards Cardston.