There are
778 mi
from San Mateo, CA to Clearfield, UT
That's the driving distance. It would take 13 hours 31 mins to go from San Mateo, California to Clearfield, Utah.
The flight distance (direct flight from San Mateo, CA to Clearfield, UT) is 602.02 mi.
778 mi = 1,251.91 kms