There are
2,299 mi
from Clearlake, CA to Clarksville, IN
That's the driving distance. It would take 1 day 16 hours to go from Clearlake, California to Clarksville, Indiana.
The flight distance (direct flight from Clearlake, CA to Clarksville, IN) is 1,976.73 mi.
2,299 mi = 3,700.40 kms