For my tastes it's a little harsh looking. Quite possibly that interprets the character of the place quite well, but I'm an old softy.
Most of the tones are clumped together in peaks at the dark and bright sides of the histogram, with a relatively empty valley in the tonal midrange. My tendency would be to pull up all the darks and pull down all the lights to fill in the midrange. Without losing that brooding feeling, piece o' cake, right.
As Wim mentioned, the sky is pretty bright. I find myself squinting! Which is probably how it looked. Anyway, would prefer to bring down the brightest parts of the sky to something less than clipping.
The transition from readable tones to inky black shadows seems too abrupt in the trees to the left and along the riverbank and to some extent on the sides of the mountains. I would prefer a longer march of tones going from readable textures receding more gradually into blank shadow. It's nice to have some absolute d-max blacks in most any photo, but IMHO not at the cost of letting textural information fall into a black hole. Don't lose the d-max areas, but scale them down in size in proportion to the overall tonal scheme.
For the last few weeks I've been hung up on atmospheric effects, so I would suggest slightly brightening and lowering the contrast in the distant areas down the canyon, I think that would help increase the apparent depth of the scene.
But whatever, that's a pretty shot as it stands and I wish I could get out to places like that.