There are
755 mi
from Provo, UT to Clearlake, CA
That's the driving distance. It would take 13 hours 30 mins to go from Provo, Utah to Clearlake, California.
The flight distance (direct flight from Provo, UT to Clearlake, CA) is 590.11 mi.
755 mi = 1,215.71 kms