Lake Yellowstone is a nice landscape piece. I think it was a great capture and placement of the trees, the nice off centered balance is prefect for me. It is very interesting how white the trees appear, it really makes the shot seem cold. I think this was an extremely hard category, especially with 800+ entries. I might have turned up the contrast and played with burning and or dodging to see what the image could be with some editing. I think catching the dark sky with the clouds really lets this become a better landscape shot and possibly enhancing this in contrast to striking trees. I am surprised you picked such a light piece looking at your other shots but good work on this one.
The is in desparate need of contrast enhancement, or dodge and burn, or something. It has so much potential in my eyes but at the moment it just seems flat.