There are
793 mi
from Rancho Cucamonga, CA to Montrose, CO
That's the driving distance. It would take 13 hours 50 mins to go from Rancho Cucamonga, California to Montrose, Colorado.
The flight distance (direct flight from Rancho Cucamonga, CA to Montrose, CO) is 619.24 mi.
793 mi = 1,276.08 kms