A couple of things to know though, your feet can take a while to get used to going "barefoot". I don't wear mine during the Winter (too cold in Minnesota) and when I start again in Spring, my feet start to kill me after a mile or two. Wearing shoes or hiking boots your feet atrophy and it can take some getting used to be able to go longer distances "barefoot".
Another problem with hiking mountains in CO is that while the Vibrams will protect your feet from cuts and scrapes on rocks, you will still feel the sharp edges and it's easy to get beat-up feet if you're not used to it.
Vibram's aren't "water shoes" (though they can be used for that), but they represent an extreme change in how you treat your body and can take some time getting used to them. I love mine though, walking/jogging barefoot reduces discomfort in my back.
I would consider them a water based activity shoe ie kayaking or canoeing with maybe some portages but not a serious long trek hiking shoe. To each his own however, there is a growing population of barefoot hikers and this is close to that.