Wyoming Highway 89 follows State Control Route 10 for its entire length.

[1] From Exit 5, WYO 89 heads north as Front Street into downtown Evanston.

Just after leaving Bear River, WYO 89 temporarily ends at Utah State Route 16.

SR 16 intersects SR-39 in Woodruff, Utah at 10.51 miles (16.91 km) from its start at WYO 89.

SR-30 'East' travels back to Wyoming State Line, where at 33.00 miles (53.11 km), SR-30 ends and WYO 89 resumes.

[2] Wyoming Highway 89 heads north from U.S. Route 30 as it continues westward.

However, within a few years, US 89 was rerouted to its current route in Utah and Idaho, and US 189 was created along old Highway 287.