Snow on the Sagebrush - stage 4

 I have roughed in the snow on the land after pretty much finishing the background mesas. I have also roughed in the sagebrushes and the rock at bottom left.

I am feeling my way around this one, largely because a lot of it is coming from the imagination and am having to try different colours to see how they work before proceeding. I'm leaving it like this so that I can look at it tomorrow morning over my breakfast coffee and see what I have to do next. I might for instance break up the foreground with some branches of a bush to cut across the line where the snow meets the red rock...