There are
976 mi
from Gresham, OR to Pasadena, CA
That's the driving distance. It would take 18 hours 29 mins to go from Gresham, Oregon to Pasadena, California.
The flight distance (direct flight from Gresham, OR to Pasadena, CA) is 816.34 mi.
976 mi = 1,570.91 kms