Luvsanlkhündegiin Otgonbayar, is a Mongolian athlete. She has represented her country by running the marathon at competitions such as the 2004 Summer Olympics, the 2006 Asian Games, the 2007 World Championships and the 2012 Summer Olympics.

The women's marathon at the 2004 Summer Olympics took place on August 22 in the streets of Athens, Greece. These streets were recently painted for the event, which provided an excellent road surface for the athletes. Drawing upon the ancient origins of the race, the marathon began in Marathon, Greece, and eventually ended at Panathinaiko Stadium, the venue previously used for the 1896 Athens Olympics.