There are
671 mi
from Gresham, OR to Redwood City, CA
That's the driving distance. It would take 13 hours 5 mins to go from Gresham, Oregon to Redwood City, California.
The flight distance (direct flight from Gresham, OR to Redwood City, CA) is 553.87 mi.
671 mi = 1,080.21 kms