Miles between Boulder, CO and Grafton, WI

There are
1,081 mi
from Boulder, CO to Grafton, WI

That's the driving distance. It would take 19 hours 13 mins to go from Boulder, Colorado to Grafton, Wisconsin.

The flight distance (direct flight from Boulder, CO to Grafton, WI) is 920.66 mi.

1,081 mi = 1.61 kms