The drive from Corvallis to Bozeman is approximately 300 kilometers and takes about 3.5 hours. The most reliable route is heading north to Missoula and taking I-90 East through Butte. This route offers beautiful mountain scenery and is well-maintained year-round. Personal vehicles are the only practical mode of transport.
Total Distance: Driving distance 300 km; straight-line air distance 200 km.
I-90 is the fastest and safest route.
Year-round; I-90 is well-maintained.