Very nice scene. I might back off on the red filter a little to lighten the blue sky some during the BW conversion were I doing it and, if you wish, you may read up on the "Hyperfocal Distance" to keep the photo sharper from front of frame to background.
Very interesting country.
Canon 5D MarkII Adobe Lightroom v3.4 (64 bit)
Paint Shop Pro Ultimate X3.2 - PS CS5-Painter 11