There are
675 mi
from Redwood City, CA to Troutdale, OR
That's the driving distance. It would take 13 hours 5 mins to go from Redwood City, California to Troutdale, Oregon.
The flight distance (direct flight from Redwood City, CA to Troutdale, OR) is 556.54 mi.
675 mi = 1,085.90 kms