Miles between Boulder, CO and Greenfield, WI

There are
1,049 mi
from Boulder, CO to Greenfield, WI

That's the driving distance. It would take 18 hours 32 mins to go from Boulder, Colorado to Greenfield, Wisconsin.

The flight distance (direct flight from Boulder, CO to Greenfield, WI) is 914.38 mi.

1,049 mi = 1.61 kms