This popular guidebook to the magnificent Sierra Mountains has been expanded and improved. There is 30 per cent new content in this edition, including new route descriptions, additional peaks described with more historical information, and GPS-enabled driving directions. More than 80 new routes have been added to this comprehensive guide, the only book to cover all known routes on more than 570 Sierra peaks. It details mountains and trails of Sierra high country where glaciated valleys, pinnacles and spires, moonscape meadows, and alpine lakes - combined with the region's characteristic good weather - offer hikers, climbers, skiers, and cross country ramblers unsurpassed opportunity for wilderness, exploration and discovery.