There are
442 mi
from Rancho Cucamonga, CA to Rocklin, CA
That's the driving distance. It would take 8 hours 10 mins to go from Rancho Cucamonga, California to Rocklin, California.
The flight distance (direct flight from Rancho Cucamonga, CA to Rocklin, CA) is 381.68 mi.
442 mi = 711.05 kms