This comprehensive guidebook is full of information about the San Juan River and the lands surrounding it. It draws you into the heart of the San Juan, delving into its geology, biology, and human history, making it alive with over 100 maps, illustrations and photos. River maps are detailed, easy-to-read, and face downstream so what you see on the map is what you see on the river. Maps include campsites, rapids and riffles, points of interest, geologic features, and references to the text for more information. This third edition starts at Montezuma Creek, has color photos and figures,includes a new fossil section, and has an updated river channel from 2013 Google Maps since the river the river's course changes in wide sections. Waterproof, 96 pages.