There are
2,380 mi
from Hillsborough, CA to Forest Park, OH
That's the driving distance. It would take 1 day 17 hours to go from Hillsborough, California to Forest Park, Ohio.
The flight distance (direct flight from Hillsborough, CA to Forest Park, OH) is 2,038.38 mi.
2,380 mi = 3,829.86 kms