Miles between Boulder, CO and Monrovia, CA

There are
1,011 mi
from Boulder, CO to Monrovia, CA

That's the driving distance. It would take 17 hours 47 mins to go from Boulder, Colorado to Monrovia, California.

The flight distance (direct flight from Boulder, CO to Monrovia, CA) is 809.38 mi.

1,011 mi = 1.61 kms