I did make two other changes (couldn't resist) as I adjusted the color of your photo. And, yes, I'm afraid LR is going to fall short here. I made an overall Levels change but applied it disproportionally. LR does not have a Levels adjustment pre se, but it can come close to the same result by using the exposure slider, blacks, contrast and saturation controls. What LR can't really do is apply those changes through a mask that protects the shadows -- which I did. The mask allowed me to push the Levels adjutment harder in the midtone/highlight area without the shadows getting too dark. This is likey what you're seeing as the biggest difference. Put another way, I was able to raise the contrast higher in the midtone section of the photo and still keep the shadows in the trees along the bottom from blocking up.
I went one additional step and applied a local adjustment to the mid section betweeen the two regions of mist. I applied a partial Multiply blend and then hand painted it back off the mist and bottom (mask again).
I used Photoshop but PSE and or GIMP could both do what I did -- LR isn't designed for it.
Watch out for LR's Clarity adjustment. It's capable of doing more harm than good and I often see it used that way. It's basically what we used to call defogging which was acheived by an unintended use of unsharp masking. How Adobe implements "clarity" in LR (algorithmically) is proprietary, but it definetly has a tendency to halo regions of the photo.
LR is a good Raw converter with some extended capabilities -- especially now in version 4, but it's not an editor. It's really not designed for either pixel level editing or local/regional adjustments and your photo benefits from local/regional adjustments.
Joe
P.S. Big improvement on the color, you got that right. If you're normal workflow is to shoot Raw then ultimately you're going to be pushed toward acquiring Photoshop proper (16 bit capable). Otherwise PSE and/or GIMP will serve. Photoshop's editing abilities made a huge leap forward in version CS4 and nothing added since is anything I'd spend money on, so one option to save $$$ is to look for the older version.