You have the Hemlock Grove, here is a great way to add even more interest and detail to your forest scenes!

This bundle of extra materials, trees and tree stumps gives you more variety in styles - a set of trees with a horizontal growing point for use on slopes or rock faces, a selection of tree stumps from cut to broken - to add more detail to your forest floor, a log - instance it, stack it, use it in your digital lumber jack scenes and an extra material which can apply to any of the trees in both the add on bundle here and the Mountain Hemlock trees in the main bundle! 

The trees and props in the bundle are of low (ish) resolution making them perfect for single placement in your scene or use in scattering for larger numbers of them. A little goes a long way with one plant and its instances looking like many different ones with small variations to scale and y rotation.  You need to own :Pine Forests - Hemlock Grove for the items in the bundle to load. It is part of the Hemlock Grove Bundle.

So add a stumperie to your mountain side, put some conifers on those cliffs, and drop some lumber in to your scenes with these great add on props and trees!