The Courir de Mardi Gras is a traditional Mardi Gras event held in many Cajun and Creole communities of French Louisiana on the Tuesday before Ash Wednesday. Courir de Mardi Gras is Louisiana French for "Fat Tuesday Run". This rural Mardi Gras celebration is based on early begging rituals, similar to those still celebrated by mummers, wassailers, and celebrants of Halloween. As Mardi Gras is the celebration of the final day before Lent, celebrants drink and eat heavily, dressing in specialized costumes, ostensibly to protect their identities. In Acadiana, popular practices include wearing masks and costumes, overturning social conventions, dancing, drinking alcohol, begging, trail riding, feasting, and whipping. Mardi Gras is one of the few occasions when people are allowed to publicly wear masks in Louisiana. Dance for a Chicken: The Cajun Mardi Gras, a documentary by filmmaker Pat Mire, provides great insight into the history and evolution of this cultural tradition. In popular culture, two HBO series also make reference to the tradition.

Mardi Gras is the final day of Carnival ; it thus falls on the day before the beginning of Lent on Ash Wednesday. Mardi Gras is French for "Fat Tuesday", reflecting the practice of the last night of consuming rich, fatty foods in preparation for the Christian fasting season of Lent, during which the consumption of such foods is avoided.