The only guide to detail all the known routes on 570 peaks in the Sierra Nevada mountains More than 100 new routes, route variations, and winter ascents in this edition compared to the previous User friendly organization Author has made more than 350 ascents in the Sierra High Sierra is the most popular guidebook to this magnificent mountain range, and has long been the definitive source of climbing and hiking information for this wonderland. This comprehensive and exhaustive guidebook includes route descriptions, historical information, and GPS-enabled driving directions. This edition rearranged the information to keep roads and trails, and passes and peaks together, making the book easier to use.