Getting to sorrow's furnace

How do I go about getting to sorrow's furnace as a nightfall character?

have you done the quest to tyria?
in game type: /wiki tyria
read getting there from elona

if already in tyria, you need to get to deldrimor war camp... you can prob buy a run from lions etc. idk if you need to do any quests, but wiki if your friend.

http://wiki.guildwars.com/wiki/Sorrow's_Furnace

Edit:
Remember wiki is your friend and will provide a ton of answers if used right.

it can be easier to get a runner ( if any on ) from beacons perch - if you are thinking of fighting way down becareful - beacons is 6 party size and the 3 zones you pass thru are evil to fight thru - also bring loads of dp removal - this is also the harder longer way.
Also if fighting do as showtime suggested and wiki each zone so you know what to expect.

Fighting's a lot more fun than buying a run, and not nearly as difficult as it used to be. Even an indifferently-built party of Heroes will have little trouble getting down Lornar's Pass and through Dreadnought's Drift. It *WILL* take quite a while and require some careful pulling in places, but it's quite satisfying to make your way there on your own.

You may find this map useful too Enct. I usually find it helps with planning routes:

http://www.loreofmythos.com/Portals/...ps/FullMap.jpg