There are
2,288 mi
from Clarksville, TN to Piedmont, CA
That's the driving distance. It would take 1 day 16 hours to go from Clarksville, Tennessee to Piedmont, California.
The flight distance (direct flight from Clarksville, TN to Piedmont, CA) is 1,910.71 mi.
2,288 mi = 3,682.83 kms