There are
668 mi
from San Mateo, CA to Troutdale, OR
That's the driving distance. It would take 12 hours 55 mins to go from San Mateo, California to Troutdale, Oregon.
The flight distance (direct flight from San Mateo, CA to Troutdale, OR) is 551.12 mi.
668 mi = 1,074.44 kms