#3 Great design, and the colors 'fit' the theme of the page, hiking, nature, quiet. Its a very coherent total picture. Its also very cleanly designed, very professional. My compliments.
About the others:
#1 doesnt look as clean and professional.
#2 Colortheme doesnt add to the theme/subject of the page. More over, reddish colors are interpreted more aggressive, while the colors from #3 leave a more tranquil impression, which will also slow people down clicking away from it.
Hope you can do something with this,
-AB-