FILL 'ER UP
oilville, near the auctioneer. mounts in this game are permanent, so people have to leave them outdoors. there's also built-in teamspeak, so it's oddly immersive when your group rolls up on a bandit camp and someone's like "okay, let's ditch the horses back here where they won't be seen"
there are also plenty of motorized vehicles, but horses are cheap and there is a tremendous noob surplus at launch
none of my good pictures came out :< me and this guy were doing prone TACTICAL ESPIONAGE ACTION in a bar while people were trying to drink