There are
2,058 mi
from Walnut Creek, CA to Middleton, WI
That's the driving distance. It would take 1 day 11 hours to go from Walnut Creek, California to Middleton, Wisconsin.
The flight distance (direct flight from Walnut Creek, CA to Middleton, WI) is 1,736.35 mi.
2,058 mi = 3,312.57 kms