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In July 2009 I flew from Coldfoot, Alaska into Gates of the Arctic National Park with my colleague and friend Thomas Liebscher, the park's Chief of Resources. We chartered a small plane to take us deep into the park, which, at 8.4 million acres and above the Arctic Circle, is one of the largest and most northerly wilderness areas in the United States. Our plane was equipped with fat balloon tires to land us on a gravel bar on the flood plain of the Okimilaga or Chandler River, where we unloaded our camping gear and searched for a suitable place to pitch tent.