The dizzyingly high drive along the Guanella Pass Scenic Byway might just be the ultimate autumnal Denver day trip, a thrilling automotive adventure that will have you soaring up above the tree ...
Oct. 1—The Guanella Pass Scenic Byway, strewn with aspen-covered mountainsides, 14,000-foot peaks and alpine lakes, attracts large crowds for fall leaf peeping for a reason.