Miles between Mill Valley, CA and Boulder, CO

There are
1,243 mi
from Mill Valley, CA to Boulder, CO

That's the driving distance. It would take 21 hours 30 mins to go from Mill Valley, California to Boulder, Colorado.

The flight distance (direct flight from Mill Valley, CA to Boulder, CO) is 937.89 mi.

1,243 mi = 2,000.94 kms