There are
2,101 mi
from San Marcos, CA to Richfield, WI
That's the driving distance. It would take 1 day 12 hours to go from San Marcos, California to Richfield, Wisconsin.
The flight distance (direct flight from San Marcos, CA to Richfield, WI) is 1,709.97 mi.
2,101 mi = 3.22 kms