I don't always give critiques, for I'm not very experienced myself. I'm pretty lenient and gentle for the most part, too.
So... I think this is very pretty. The idea is really cool, and I love the way you made it. The fur texture is pretty awesome, and I love the nature effects. The shading and lighting look good, too.
The mountains are good. Since they are far away, it's good that you didn't put a lot of detail into them.
The snow is looks great, too. So does the sun.
I like your style, but I feel as though the wolf is a bit skinny. (I'm sorry if I'm wrong, I don't know a ton on wolves.) Other than that, I think it looks great! The muzzle is good, and the placement of the eyes is nice.
Hmmm critique you say. I am no master at canine anatomy but I think the back looks odd(it's almost a perfect straight line xD), the character needs to be a bit beefed up. And be careful how you arrange the ear o 3 o