When it comes to biking, what’s gonzo to one rider may be nothing but sweet singletrack to another. Colorado has a staggering variety of trails that appeal to all skill levels, but the routes that demand total concentration and titanium-steely ner...

Let’s face it: Colorado was made for hiking. From the highest peaks in North America to the lush forests of lodgepole pine and aspen, wildflower-blanketed meadows that go on for miles to river- and glacier-carved canyons, the Rocky Mountain landsc...