When white explorers advanced into the American wilderness for the first time, they were almost never pioneering a new route. Men like Lewis and Clark, Jedediah Smith, and John Charles Frémont were, with rare exceptions, following the immemorially ancient trails used by Native Americans for trade, hunting, and war. Not so with Powell. Although parts of the Grand Canyon were known intimately, many sections had never been touched. The shoreline of the river itself was so riven by impassable cliffs that the first traverse on foot would not take place until 1977.
When white explorers advanced into the American wilderness for the first time, they were almost never pioneering a new route. Men like Lewis and Clark, Jedediah Smith, and John Charles Frémont were, with rare exceptions, following the immemorially ancient trails used by Native Americans for trade, hunting, and war. Not so with Powell. Although parts of the Grand Canyon were known intimately, many sections had never been touched. The shoreline of the river itself was so riven by impassable cliffs that the first traverse on foot would not take place until 1977.
Still one of the least populated areas of the world.

