There are
2,002 mi
from San Marcos, CA to Stoughton, WI
That's the driving distance. It would take 1 day 11 hours to go from San Marcos, California to Stoughton, Wisconsin.
The flight distance (direct flight from San Marcos, CA to Stoughton, WI) is 1,654.09 mi.
2,002 mi = 3.22 kms