Miles between Boulder, CO and Marshalltown, IA

There are
736 mi
from Boulder, CO to Marshalltown, IA

That's the driving distance. It would take 12 hours 55 mins to go from Boulder, Colorado to Marshalltown, Iowa.

The flight distance (direct flight from Boulder, CO to Marshalltown, IA) is 658.88 mi.

736 mi = 1,185.17 kms