At Stromgarde Keep in Arathi Highlands you can finish the quest were you have to kill the prince and the next part of the chain were enter the tome for the troll slayer weapon or whatever if you have a mount. Right inside the front gate to Stromgarde Keep theres a bridge, at the left of the bridge is a statue. Go behind the right lef of the statue and jump to the bridge, aim for betwwen the bridge and the tree and your clime on to the bridge by passing about 12 or so elite mobs. I did this with my wolf and a group member did it with a kodo, didn't try it with other mounts though.
You can find the information regarding this quest at thottbot,
