This is reminiscent of the foothills in California as they give way to the Sierras. Here, I used a hake brush about 2 inches wide to render everything – land, sky, trees. Most was wet-in-wet, but the blobs of bushes and some of the trees were done on a dryer surface.
Ink, Yarn & Beer 
Simple but very effective!
Fraggy, it was even simpler till I put my finger in the lower left corner and had to fix it up!!
These things happen 😊