The National Park Service has produced a terrific short video about the exploration of the Brooks Range by the United States Geological Survey from 1899-1911, with photographs from the six expeditions that were mounted to map the area. You can watch it online, at http://www.nps.gov/…/…/avElement/gaar-USGS-Exploration-4.mp4.
For more information from the National Park Service about the history of USGS exploration in the Brooks Range.