As the trail wound its way into Arizona's Sky Islands, the region's biodiversity was on full display, as were the threats from rising temperatures.
Backpacker on MSN
A third of Appalachian Trail hikers still sleep with their food in bear country, survey finds
About 20 percent more people are storing their food in their tent with them than in the recommended bear cans.
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Charles Hosch, 67, hiked up Georgia's Blood Mountain on the Appalachian Trail a month ago. Despite massive searches, the Texas lawyer and professor hasn't been seen since.
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