Miles between Grand Rapids, MI and Boulder, CO

There are
1,177 mi
from Grand Rapids, MI to Boulder, CO

That's the driving distance. It would take 20 hours 58 mins to go from Grand Rapids, Michigan to Boulder, Colorado.

The flight distance (direct flight from Grand Rapids, MI to Boulder, CO) is 1,032.32 mi.

1,177 mi = 1.61 kms