The journey from Cheyenne to Missoula covers approximately 900 kilometers through the Rocky Mountains. The most efficient route involves taking I-25 North to I-90 West. This drive takes about 9 hours, passing through scenic mountain landscapes. It is a beautiful route, but requires careful attention to weather conditions, particularly in winter.
Total Distance: 900 km driving distance; 750 km straight-line air distance.
Be prepared for steep grades and high altitudes.
Summer or early autumn for clear mountain roads.