The drive from Corvallis to Helena is approximately 200 kilometers and takes about 2.5 hours. The route involves heading north to Missoula, taking I-90 East to Garrison, and then I-12/I-15 North to Helena. This route is well-maintained and offers beautiful mountain scenery. Personal vehicles are the only practical mode of transport.
Total Distance: Driving distance 200 km; straight-line air distance 130 km.
I-90 and I-15 are the fastest and safest routes.
Year-round; the highways are well-maintained.