Great work so far

I agree with Lighting about the specularity on the trees. Especially in the foreground it could be toned a bit down.
It also accounts for the glacier's ice. It seems almost glowing like it is hot instead of terribly cold

The lighting is very cool, I like it as well as the background mountain shapes. Maybe you could try add some extra displacements like strata for example?
The colors are well done too but I think the bushes and some of the surface layer have too much of an olive-green touch.
All in all still a good image

Martin