Stonehide Leather is the main material for Leather workers and the main material that skinners will be farm in the Legion expansion. When you are farming for any leather the idea is to slay any beasts that is easy to kill and spawns quickly.
Here are a few mobs to farm Stonehide Leather in Highmountain. There are all around the same area.
- Pinerock Stalker
- Pinerock Elderhorn
- Bristlefur Bear
Hope this helped you with where to farming Stonehide Leather!