There are
1,689 mi
from San Mateo, CA to Watauga, TX
That's the driving distance. It would take 1 day 5 hours to go from San Mateo, California to Watauga, Texas.
The flight distance (direct flight from San Mateo, CA to Watauga, TX) is 1,447.51 mi.
1,689 mi = 2,717.39 kms