US 6 enters Utah overlapped with US 50 in the Great Basin, a large desert that includes much of western Utah. As part of the Basin and Range Province, the terrain alternates between north-south oriented flat valleys and mountain ranges. US 6 and US 50 cross the Snake Valley, Confusion Range (through Kings Canyon), Tule Valley, House Range (via Skull Rock Pass), and Pahvant Valley (passing north of Sevier Lake), finally reaching the town of Hinckley just before they split in Delta. US 6 turns to the northeast at that city, paralleling the Union Pacific Railroad's Lynndyl Subdivision to the west of the Canyon Mountains, Gilson Mountains, and East Tintic Mountains—three ranges that form the eastern boundary of the Basin and Range Province.