>I'd believe the impediment to that will be not the regulation, but lack of horse-support infrastructure along the way (inns with stables and feeding stations,

>I'd believe the impediment to that will be not the regulation, but lack of horse-support infrastructure along the way (inns with stables and feeding stations, blacksmiths who could reshoe your horse if needed, etc). You're not wrong about this. But even if there was horse-supporting infrastructure along the way, riding a horse from Quincy to D.C. would still be way harder today, if not impossible. Just due to riding on the roads with cars, and find routes that aren't the interstate, or some major road where horse riding isn't allowed.