We will be traveling around Aspen and Glenwood Springs in late July, for ~ 5 days. In addition to rafting, biking, and hot springs, my sons really want to hike a 14er, if possible. Is there a reasonable possibility of doing this in the area we'll be in? All 5 of us are fit, active, athletic, and accustomed to hiking. But. We live in Chicago, where it is flat and low altitude, so I am trying to be reasonable about expectations. thanks for suggestions!