There are
1,817 mi
from Boone, IA to Larkspur, CA
That's the driving distance. It would take 1 day 7 hours to go from Boone, Iowa to Larkspur, California.
The flight distance (direct flight from Boone, IA to Larkspur, CA) is 1,535.77 mi.
1,817 mi = 2,923.53 kms