Lawrence J. MacDonnell is an attorney and consultant in Boulder who retired in 2013 as a professor of law at the University of Wyoming College of Law where he taught water law, public land law, and natural resources law. He is also a senior fellow at the Getches-Wilkinson Center. He was the first director of the Natural Resources Law Center at the University of Colorado School of Law, a position he held between 1983 and 1994. Between 1995 and 2009 he worked as an attorney and consultant in Boulder, Colorado. In recent years, his research and writing has focused largely on issues in the Colorado River Basin. His publications include numerous books, law review articles, other journal articles, and research reports.