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Travel

RESTRICTED -- For some skiers, it’s uphill all the way

An undated handout photo of two people skinning, the practice of climbing up slopes on skis, at a Colorado resort. The activity requires special ski boots and bindings and “skins” that prevent the skis from sliding backward. (Crested Butte Mountain Resort via The New York Times) -- NO SALES; FOR EDITORIAL USE ONLY WITH STORY SLUGGED SKIING CLIMBING UPHILL ADV17 BY GLUSAC FOR DEC. 17, 2017. ALL OTHER USE PROHIBITED.