Iñupiaq men in qayaqs, Noatak, Alaska, circa 1929. Edward S. Curtis Collection, Library of Congress Digital Collections.
Crossing the Chilkoot Pass, circa 1898. Courtesy Candy Waugaman and Klondike Gold Rush National Historical Park.
The Gold Rush boomtown of Nome on the Seward Peninsula, 1900. Courtesy of U.S. Geological Survey Photographic Library.
Alaska geologists Frank Schrader, J. Edward Spurr and Harold Goodrich pose in work clothes, 1896.
USGS Photo Library.
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.