For that general area, the places you want to search are in the mountains among the snow yeti and the ogres. That includes the caves. And if that area is as heavily mined as it is on my server there’s a good chance you won’t find any during peak periods. It’s a very well known area for iron and some mithril. Lots of people hunt for it there.
Another area to search is along the mountainous boarders of the Badlands. But that’s a higher level zone. Not a lot higher, but higher.