There are
2,880 mi
from Walnut Creek, CA to Harrison, NJ
That's the driving distance. It would take 2 days 2 hours to go from Walnut Creek, California to Harrison, New Jersey.
The flight distance (direct flight from Walnut Creek, CA to Harrison, NJ) is 2,536.24 mi.
2,880 mi = 4,635.27 kms