A murder mystery train is an event hosted aboard a train in which participants try to solve a fake murder presented by the event organizers. They are typically designed for an adult audience and usually include alcoholic beverage service and a full course meal.
Murder mystery trains often follow a theme such as a serving place or time period, and passengers are expected to dress appropriately. One of the actors is "murdered" early in the journey, and clues are provided throughout the trip to help the attendees figure out who the culprit is. A prize is usually rewarded to the passenger who can figure out the details of the murder the fastest.