Mountain biking can be intimidating, especially for beginners venturing off familiar trails. Yet not every far-flung fat tire destination requires the skills to tackle rock drops, steep downhills and exposed precipices. There are several dirt destinations around Colorado where newbies can get comfortable on singletrack trails and take their nubby tire skills to the next level. Here are a few of my favorites to check out this summer. Eagle Thirty miles west of Vail, where the mountains transition from pine and aspen trees to sagebrush, piñons, fields of tall grass, wildflowers and high desert landscapes, sits the town of Eagle, an oasis for mountain bikers of all skill levels.