I have a quest for you

Go to Tuttle, a small town in North Dakota then go to the only church in town. After arriving at this church, head behind it and look around the southern end of the small bunch of trees, you will find a tree with three rocks stacked on top of each other at its base. If you dig down 2 feet at the east by southeastern side of this tree, you will find a small box in it there is a note with instructions to the next part of your quest