Miles between Round Rock, TX and Castle Rock, CO

There are
879 mi
from Round Rock, TX to Castle Rock, CO

That's the driving distance. It would take 15 hours 53 mins to go from Round Rock, Texas to Castle Rock, Colorado.

The flight distance (direct flight from Round Rock, TX to Castle Rock, CO) is 734.47 mi.

879 mi = 1,415.08 kms