Hackberry is 23 miles northeast of Kingman, Az. It has a post office which serves 68 residential mailboxes. It is best known because it is on the longest, continuous, stretch of the original Route 66 that is in use today.Hackberry General Store appears to be the biggest attraction. It was closed when I drove by. After reading some of the online reviews, I wish it had been open and I could have stopped for a quick run through.