Dathan Ritzenhein is an American long-distance runner known for his achievements in both road racing and track events. Born on December 30, 1982, in Grand Rapids, Michigan, he gained prominence in the early 2000s, particularly as a standout athlete during his college years at University of Colorado. Ritzenhein has competed in several major international competitions, including the Olympics and World Championships. He has set personal bests in various distances, including the marathon, where he has recorded impressive times, showcasing his versatility and endurance as a top-level athlete.