I found this a while back and forgot to get around to posting it. But now I have, so follow my screenshot guide to getting out of Searing Gorge.
1. Head here:
Minimap:
2. Go up the path, past all the 47ish elite mobs.
3. Right we see a big lava altar thingy. Thats bad. We go left, and come to this slope:
4. Walljump your way up that to here:
5. To your left there is a path, follow that:
6. Have fun exploring