There are
1,004 mi
from Rancho Cucamonga, CA to Forest Grove, OR
That's the driving distance. It would take 19 hours 2 mins to go from Rancho Cucamonga, California to Forest Grove, Oregon.
The flight distance (direct flight from Rancho Cucamonga, CA to Forest Grove, OR) is 840.68 mi.
1,004 mi = 1.61 kms