Due to the elevation in Colorado, it's wise to start with EASY hikes if you are new to hiking. Yet again, the elevation can be a doozy, even if you consider yourself to be very physically fit. Try a trail above that is rated Easy first, and if that goes well, you can upgrade to Moderate on your next one. It's always best to start with something you know that you can handle before getting yourself in too deep, and fortunately, in Colorado, even the easiest hikes are pretty darn spectacular.