Miles between Boulder, CO and Walnut Creek, CA

There are
1,228 mi
from Boulder, CO to Walnut Creek, CA

That's the driving distance. It would take 21 hours 6 mins to go from Boulder, Colorado to Walnut Creek, California.

The flight distance (direct flight from Boulder, CO to Walnut Creek, CA) is 912.54 mi.

1,228 mi = 1.61 kms