U.S. Route 18 in Wyoming
…at I-25 (itself concurrent with US 20, US 26, and US 87) and travels 42 miles (68 km) east to Lusk, where US 18 branches off to run concurrently with US 85 for 47 miles (76 km). At the unincorporated community of Mule Creek Junction in northeastern Niobrara County, US 18 leaves US 85. This 10-mile (16 km…