Can you identify these mountain pieces top view 
side view

profile view

2 x 2 bricks added for size reference
Looks like: 


Part #47847 - Rock Panel 2 x 4 x 6.


Part #3684a - Slope 75 2 x 2 x 3 - Hollow Studs.





Part #4460b - Slope 75 2 x 1 x 3 - Hollow Stud.