There are
723 mi
from Arvada, CO to Marshalltown, IA
That's the driving distance. It would take 12 hours 39 mins to go from Arvada, Colorado to Marshalltown, Iowa.
The flight distance (direct flight from Arvada, CO to Marshalltown, IA) is 653.84 mi.
723 mi = 1,162.84 kms