Miles between Boulder, CO and Smithfield, NC

There are
1,685 mi
from Boulder, CO to Smithfield, NC

That's the driving distance. It would take 1 day 7 hours to go from Boulder, Colorado to Smithfield, North Carolina.

The flight distance (direct flight from Boulder, CO to Smithfield, NC) is 1,497.59 mi.

1,685 mi = 1.61 kms