Held every October for the past six years, and loosely coinciding with National Taco Day (yes, that’s a thing), it’s an unconventional and entirely unsanctioned fun run that has several ridiculous rules—a.k.a. the semi-optional Taco Bell 50K Commandments that are printed on the back of the event’s race bibs—including the need to eat something from the Taco Bell menu at every stop.

While that could mean consuming something small at most of the restaurant visits—like, say, an order of Nacho Fries or Cinnamon Twists—the fourth and eighth aid stations demand a higher level of gastrointestinal fortitude. At those stops, participants must opt for one of the larger and more calorie-intensive “Supreme” menu items, such as a Crunchwrap Supreme, Burrito Supreme, or Nacho Cheese Doritos Locos Tacos Supreme.