There are
693 mi
from Yakima, WA to Walnut Creek, CA
That's the driving distance. It would take 13 hours 44 mins to go from Yakima, Washington to Walnut Creek, California.
The flight distance (direct flight from Yakima, WA to Walnut Creek, CA) is 606.05 mi.
693 mi = 1,114.58 kms