dozens of additional photographs, this edition of Geology Hikes of Northern California has been updated, expanded and improved. This unique guide is indispensable for anyone interested in knowing more about the natural world encountered on California's varied walking and hiking trails. Intended for non-scientists, this book gives the average hiker just the right amount of information to appreciate the geological forces that shaped the landscape without overburdening you with technical details you neither want nor need. If you thrill at caves, want to climb a volcano, are awed by the power of time to sculpt stone into natural works of art, and are keen to investigate geysers, bubbling mud pots, lava flows, old mines and more, you will find many great adventures in this guide, ranging from family walks on nature trails to more strenuous mountain trekking and everything in between. Areas covered: Klamath Mountains and the North Coast, the Cascades, the Modoc Plateau, the Coast Ranges, the Great Valley, the Mother Lode, and the Sierra Nevadas.