Hay is an Oregon conservationist long active in Lewis and Clark commemorative efforts. He offers fellow outdoor enthusiasts a guide to 16 trail reaches (sections) constituting the Lewis and Clark Columbia River Water Trail, which pays homage to the explorers and the main mode of transportation of the native peoples they encountered. Trail entries include maps, illustrations, and information on distance, river conditions, and historic and recreational sites. Historical and geographical context, safety and etiquette tips, and resources round out the guidebook. Annotation ©2004 Book News, Inc., Portland, OR (booknews.com)