Ragon is in the dark cave, just east of the bunker at the start of the fjords (facing the bunker, is is a little ways left of where the anti-dragon shields ended).
If searching the forum doesn't give the required info, and you are not too worried about spoilers, you could search the
walkthrough (the exact name would help), or check out the
guide (with screenshots) and
D2:ED Wiki.
There is nothing wrong with asking in the forum, though, especially if you just need a point in the right direction, rather than screenshots or a list of steps in a quest.