In Super Mario Galaxy 2, Rainbow Road appears in both missions of the Rolling Coaster Galaxy, but it is very different than in its previous appearances. Outside the Mario Kart series, Rainbow Road has also made some appearances in other games. Rainbow Road is also usually a long course when compared to other courses. Starting in Mario Kart 7, some of the Rainbow Road courses have some sections of the race track that are not rainbow-colored. Due to these obstacles, Rainbow Road is among the difficult courses in each Mario Kart game. Most contain few or no railings, putting racers at risk of falling into space, and each Rainbow Road also contains its unique hazards. They typically appear floating in deep space or atmosphere, although the one in Mario Kart: Double Dash!! and the remade N64 Rainbow Road and SNES Rainbow Road in Mario Kart 8 hang suspended in a starry night sky above a landscape. Most of them are transparent throughout the Mario Kart series. As the name suggests, these courses are made of rainbow-colored glass or metallic surfaces that are either one color or change their color as racers pass by them, depending on the game they appear in. Rainbow Road is the final course of the Special Cup featured in all Mario Kart games and is the climactic course of each game it appears.

Rainbow Road in its appearance in Mario Kart 8

Super mario run all rainbow bridges