There are
1,859 mi
from Ukiah, CA to San Marcos, TX
That's the driving distance. It would take 1 day 8 hours to go from Ukiah, California to San Marcos, Texas.
The flight distance (direct flight from Ukiah, CA to San Marcos, TX) is 1,567.55 mi.
1,859 mi = 2,992.50 kms