Wyoming Transportation

Three interstate highways and seven U.S. highways pass through Wyoming. In addition, the state is served by the Wyoming state highway system.

Interstate 25 enters the state south of Cheyenne and runs north, crossing Interstate 80 in Cheyenne. It passes through Casper and ends at Interstate 90 near Buffalo.

Interstate 80 crosses the Utah border west of Evanston and runs east through the southern half of the state, passing through Cheyenne before entering Nebraska near Pine Bluffs.

Interstate 90 comes into Wyoming near Parkman and cuts through the northern part of the state. It serves Gillette and enters South Dakota east of Sundance.

The U.S. highways that pass through the state are:

• U.S. Route 14
• U.S. Route 16
• U.S. Route 20
• U.S. Route 30
• U.S. Route 26
• U.S. Route 89
• U.S. Route 191
• U.S. Route 287