Horses are very poor at swimming. Horses cannot jump while standing still, however they are able to jump while galloping. The last horse the Hero got on will fast travel with them, including the unicorn. Horses tend to fight back if attacked first, except Shadowmere who attacks immediately. With a high enough Speed and Athletics, it is possible to outrun any horse. Some characters can also use horses. For instance, Imperial Legion soldiers can be seen patrolling, as well as couriers riding black horses.