There are
2,137 mi
from Redwood City, CA to Marshfield, WI
That's the driving distance. It would take 1 day 13 hours to go from Redwood City, California to Marshfield, Wisconsin.
The flight distance (direct flight from Redwood City, CA to Marshfield, WI) is 1,729.62 mi.
2,137 mi = 3,439.79 kms