This book makes you the tour guide for your group! Janet Chapple shares plenty of history anecdotes, with tips for you to spot wildlife, catch geyser eruptions, stay safe, and escape the crowds. Mile-by-mile road logs and maps show you everything there is to see. Updated by editor Beth Chapple, this sixth edition includes which geysers and hot springs are active, a new geological time line, new and enlarged color photos—adding up to more than 230 photos and illustrations—and 38 new and revised maps. Previous editions won Silver in the IBPA Benjamin Franklin Awards in 2010 and 2018.