Technical Abstract: Riparian zones are generally defined as the area of transition between the uplands and aquatic ecosystems associated with streams and lakes. In recent years, a great deal of emphasis has been placed on the riparian zones of the western U.S. The emphasis, on both public and private land, has been a result of concerns over water quality, wildlife and fish habitat, and endangered species associated with riparian zones. Agriculture in general, and livestock producers in particular, will be impacted by policy and management decisions associated with riparian zones. There are many human activities, both past and current, that impact riparian zones. In this article I outlined some of the major historical impacts. A better understanding of the broad array of impacts will help managers in the planning and decision-making process.