There are
2,130 mi
from San Mateo, CA to Marshfield, WI
That's the driving distance. It would take 1 day 13 hours to go from San Mateo, California to Marshfield, Wisconsin.
The flight distance (direct flight from San Mateo, CA to Marshfield, WI) is 1,731.60 mi.
2,130 mi = 3.22 kms