There are
2,306 mi
from Walnut Creek, CA to Clarksville, IN
That's the driving distance. It would take 1 day 16 hours to go from Walnut Creek, California to Clarksville, Indiana.
The flight distance (direct flight from Walnut Creek, CA to Clarksville, IN) is 1,961.24 mi.
2,306 mi = 3,710.54 kms