To gain access to this great mine, you must first complete The Grand Tree Quest. The mine is located in the Tree Gnone Stronghold underneath the Grand Tree.

Further investigation of the mining area reveals that there are 2 Adamantite, 3 Mithril, 4 Gold, 4 Silver, 14 Coal, 7 Iron, and 4 Clay rocks and to your advantage a nearby bank.

After completion of the Quest, you may enter by pressing on a root that is located a little Northeast of the ladder that will take you up to the Grand Tree. By pressing on this root, you will then walk thru over to the other side, where the mining rocks are.

Once completing the quest and upon leaving the mine area and the Grand Tree, you may gain access to the mine again by going to The Grand Tree, entering the door, and twisting the stone tile that is located on the floor. This will take you down below the tree, near the ladder that was mentioned before. Then go to the root and push on it.

With the new fatigue system and sleeping bags, this is a great mine with various different rocks that all miners
should love.

But don't forget, all miners love a close bank. To access the Grand Tree bank, go back up the ladder where you
will be at the base of the Grand Tree.

Go up the next ladder, then go thru the WEST door. You will then be on
the Grand Tree's branches. Take the path a little ways, then go south, follow along the path and you will come
to the Grand Tree bank.

Hope this helps and have fun mining!