There are
2,056 mi
from Riverside, CA to Clarksville, IN
That's the driving distance. It would take 1 day 11 hours to go from Riverside, California to Clarksville, Indiana.
The flight distance (direct flight from Riverside, CA to Clarksville, IN) is 1,781.97 mi.
2,056 mi = 3,308.95 kms