There are
1,006 mi
from Gresham, OR to Barstow, CA
That's the driving distance. It would take 19 hours 8 mins to go from Gresham, Oregon to Barstow, California.
The flight distance (direct flight from Gresham, OR to Barstow, CA) is 785.92 mi.
1,006 mi = 1.61 kms