I very much like the terrain, but I have some crits. I would lower the reflectiveness of the water, or give it some murkiness, because you can't see where rock ends and reflection begins in the rocky area on the opposite side of the lake. If you get my point.
The grass on the opposite hills seems like bushes or even trees to me (scale wise), and then you see the large trees. It doesn't convince for me. It looks like a huge terrain, a couple of kilometers, but the you have this giant grass and flowers. What if you decrease the grass/flower size to 1/4? Or even replace the distant grass by Dandel0's global grass.
But I really like the... indeed .. landslide. How did you get this: WM?
---Dune