There are
477 mi
from Rancho Cucamonga, CA to Grass Valley, CA
That's the driving distance. It would take 8 hours 55 mins to go from Rancho Cucamonga, California to Grass Valley, California.
The flight distance (direct flight from Rancho Cucamonga, CA to Grass Valley, CA) is 402.07 mi.
477 mi = 767.72 kms