OPTION A: about 430 miles, 6-8 hours, all four-lane divided highways
- I-84 from Boise to Hermiston, OR
- I-82 from Hermiston, OR to Kennewick, WA
- US-395 from Kennewick to Ritzville
- I-90 from Ritzville to Spokane
OPTION B: about 370 miles, 7-9 hours, mostly two-lane highways in the mountains
- ID-55 from Boise to New Meadows
- US-95 from New Meadows to near Lewiston
- US-195 from near Lewiston to Spokane
OPTION C: about 400 miles, 7-9 hours, mostly two-lane but partially four-lane divided
- ID-55 from Boise to New Meadows
- US-95 from New Meadows, past Lewiston to Coeur d' Alene
- I-90 from Coeur d' Alene to Spokane
