Two hundred years ago, a 30-man U.S. Army party ascended the Missouri River and conducted the most extensive exploration yet attempted of the North American continent¿s interior. The preparations for the Lewis and Clark expedition were exhaustive. Pres. Jefferson ensured Lewis was well prepared for his task by coaching, mentoring, and teaching the young officer for two years. Lewis and Clark then spent the better part of a third year planning and organizing for the journey. This study examines the key logistics components and considerations in the planning and execution of the mission. Modern logisticians will find themes in transportation, civilian contracting, indigenous (host nation) support, and others that still resonate today. Maps and illus.