Surprise! America's national parks are open for business during winter. Sure, your options may be a bit different than in the popular summer months, but adventurous souls will be mightily rewarded for their efforts.
There’s a reason serious hikers love taking on a loop—you never see the same thing twice, and you end where you started. Here are our top ten backpacking loops in the United States, from wildflower fields of the Maroon Bells to the Appalachian Trail in Maine.
