There are
2,039 mi
from San Marcos, CA to Lewisburg, TN
That's the driving distance. It would take 1 day 11 hours to go from San Marcos, California to Lewisburg, Tennessee.
The flight distance (direct flight from San Marcos, CA to Lewisburg, TN) is 1,734.42 mi.
2,039 mi = 3.22 kms