There are
2,342 mi
from San Marcos, CA to Coshocton, OH
That's the driving distance. It would take 1 day 17 hours to go from San Marcos, California to Coshocton, Ohio.
The flight distance (direct flight from San Marcos, CA to Coshocton, OH) is 2,002.49 mi.
2,342 mi = 3.22 kms