Background with sky and mountains
Middle ground (forests and valley with a lake)
Working with details
It's so sorry to havn't a brushes with different form in SAI (only round brushes).
So I created a triangle brush in Photoshop and drew with it far forest in middle right hill.
On the foreground I decided to draw a willow-herb.
This plant has very beautiful lilac flowers (but i don't know is it grow in Wyoming or no)
Final details - drop shadows, lights areas to clouds, snow on the top of mountains
And color correction in Photoshop of cause.
I hope you'll like my new art ;)
This my picture in full size you can buy in my store on MakersPlace
Have a nice and creative day!