I did this a while back because I was in the mood to try my hand at drawing some scenery.

I'll admit this was not entirely my own hand. I traced out some of the more important lines for the mountains themselves using the image from this link and freehanded the rest, including the valley river, from there. I probably coulda done better on the coloring and shading, though, but I did like the way the sky turned out.

Honestly, I don't really like doing traceouts as all it really does is mimic the lines, but I do it anyways for more unfamiliar things like this.