First published in 1990, this updated and enlarged edition of Challenge of the Big Trees stands as the new definitive history of Sequoia and Kings Canyon National Parks. Located in the southern Sierra Nevada of California, these twin parks, preserve an astounding sweep of natural and cultural resources, including not only the world's largest trees but also some of the most spectacular mountain terrain to be found anywhere in the nation. With its origins in the nineteenth century, the story of the two parks conveys the larger narrative of nature preservation in the United States. Generously illustrated with historic photographs and thirty-five custom maps, this new edition brings the story of Sequoia and the Kings Canyon into the twenty-first century, documenting the major changes made in the parks since 1990 and addressing the myriad challenges the parks still face, including climate change and evolving attitudes toward nature.