There are
1,726 mi
from Walnut Creek, CA to Harker Heights, TX
That's the driving distance. It would take 1 day 6 hours to go from Walnut Creek, California to Harker Heights, Texas.
The flight distance (direct flight from Walnut Creek, CA to Harker Heights, TX) is 1,462.42 mi.
1,726 mi = 2,778.16 kms