There are
692 mi
from San Clemente, CA to Riverton, UT
That's the driving distance. It would take 12 hours 10 mins to go from San Clemente, California to Riverton, Utah.
The flight distance (direct flight from San Clemente, CA to Riverton, UT) is 581.38 mi.
692 mi = 1,114.08 kms