Miles between Gary, IN and Castle Rock, CO

There are
1,049 mi
from Gary, IN to Castle Rock, CO

That's the driving distance. It would take 18 hours 32 mins to go from Gary, Indiana to Castle Rock, Colorado.

The flight distance (direct flight from Gary, IN to Castle Rock, CO) is 931.21 mi.

1,049 mi = 1,688.84 kms