Miles between Boulder, CO and Hayward, CA

There are
1,254 mi
from Boulder, CO to Hayward, CA

That's the driving distance. It would take 21 hours 38 mins to go from Boulder, Colorado to Hayward, California.

The flight distance (direct flight from Boulder, CO to Hayward, CA) is 917.60 mi.

1,254 mi = 1.61 kms