There are
1,392 mi
from Walnut Creek, CA to Rapid City, SD
That's the driving distance. It would take 1 day to go from Walnut Creek, California to Rapid City, South Dakota.
The flight distance (direct flight from Walnut Creek, CA to Rapid City, SD) is 1,067.66 mi.
1,392 mi = 2,240.04 kms