The drive from Corvallis to Spokane is approximately 350 kilometers and takes about 4 hours. The route involves heading north to Missoula and taking I-90 West through the Idaho Panhandle. This is a major interstate route and is well-maintained year-round. Personal vehicles are the only practical mode of transport.
Total Distance: Driving distance 350 km; straight-line air distance 250 km.
I-90 is the fastest and safest route.
Year-round; I-90 is well-maintained.