There are
2,944 mi
from Walnut Creek, CA to Lake Grove, NY
That's the driving distance. It would take 2 days 3 hours to go from Walnut Creek, California to Lake Grove, New York.
The flight distance (direct flight from Walnut Creek, CA to Lake Grove, NY) is 2,588.06 mi.
2,944 mi = 4,737.93 kms