the second photo for example... lots of detail (stopped down) and yet there is minimal contrast (on my PC)... post processing has a nice feel... and of course a beautiful location. Keep the feet warm is the basic task
The rock outcropping (more so in the second photo) is very nice... it is more common for us to see tree lined slopes similar to the third image.
Snow is really a challenge to photograph... I like your results... and now (maybe) the snow is over for this season...
I read that Efex works with (some, but not all versions of) Photoshop, Elements, Lightroom, Aperture... good reviews on the product... I guess you like it