This book makes you the tour guide for your group! Janet Chapple shares plenty of history anecdotes, a field guide to the plants and animals, and her tips to spot wildlife, catch geyser eruptions, stay safe, and escape the crowds. Mile-by-mile road logs document every approach to the park and every interior road. Updates to this sixth edition include which geysers and hot springs are active, a new time line of the geology, new and enlarged color photos--adding up to more than 230 photos and illustrations--and 38 new and revised maps. A selected reading list and a 21-page index round out this comprehensive guidebook. Won the Silver Medal in the IBPA Benjamin Franklin Awards for travel guides in both 2010 and 2018.