New course

A Nitro Course is a course in the Mario Kart series that has never appeared before, thus making them new courses. They have appeared in every Mario Kart title.

Lightning Cup
NOTE: From Mario Kart DS onwards, it is the last cup of the Retro Courses.

Trivia

 * The Triforce and Egg cups are the first cups to include both nitro and retro courses.
 * The four worlds after World Bowser in Super Mario 3D World resemble the Nitro Cups (World Mushroom for Mushroom Cup, Flower for Flower Cup, Star for Star Cup and Crown for Special Cup).
 * All of the 3D Mario Kart games features a nitro Wario-themed course and at least one public-road-themed course.
 * Nitro Mario Circuit, beach or water themed course, snow or ice themed course, Bowser's Castle, and Rainbow Road has appeared in all of the Mario Kart games.