It would be easy to imagine that after centuries of traverses, treks, and summits there would be no firsts left. For explorers, finding new ground to cross is almost as difficult as the actual crossing. But that's not stopping anyone: Only a month in, this already looks to be a banner year for elite adventurers, who plan to walk the length of a great river, motorcycle in a very large circle, and summit one of the most dangerous mountains on Earth. Here are the expeditions we'll be watching.
Bob Coomber's Sierra Nevada wheelchair expedition
Bob Coomber has been in a wheelchair since diabetes left him with severe osteoporosis 20 years ago. The former police officer is now a devoted hiker and became the first person in a wheelchair to climb California's 14,250-foot White Mountain Peak. He attempted an east-to-west crossing of the Sierra Nevada along the Kearsage Pass trail last fall but was thwarted by a malfunctioning insulin pump. Rested and ready, he's giving the trail a second shot. He aims to complete the 22-mile, weeklong journey to Kings Canyon National Park this July (2014).
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