Rejoice Horse Trainers: During a server hotfix today, they patched in the Autopathing feature.
You need to Alt Right-Click your waypoints with the final point being near your start location. The route will change from normal to a more glowing green when you successfully do it.
Be careful where you place your waypoints don’t just click on a city or node since many will take you on windy paths. My first trip I got caught in Northern Wheat Plantation. I found better luck zooming in on my map and clicking on open roads before and/or after junctions where you want to turn.
Edit: there’s also a checkbox now below your horse’s stamina to automatically use carrots when stamina becomes low!
(also a couple edits to fix a few typos and to move to its own post lol)