There are
1,357 mi
from San Mateo, CA to Hereford, TX
That's the driving distance. It would take 1 day to go from San Mateo, California to Hereford, Texas.
The flight distance (direct flight from San Mateo, CA to Hereford, TX) is 1,125.14 mi.
1,357 mi = 1.61 kms