Rainbow Road

Rainbow Road is the name given to the racecourses that have appeared in every game in the Mario Kart series. The multi-color track is well known by being the last stage to race in the Special Cup, as well as for being the most difficult and surreal place to compete. In general, Rainbow Road takes place in the starry night sky or in space, suspending. As such, most share by having few or no rails for security, what it can result easy for unready players to fall off of the track; even though each Rainbow Road can contain some particular hazard also.

Super Mario Kart
This Rainbow Road is notable by lacking of rails at all and containing 90-degree turns. The track is made by multi-colored tiles, unlike many of the racecourses found in the game. Some Coins lie hidden over the track, specially over the yellow tiles. Some jumping humps also appear in certain stretches through, also hidden over the track. Flashing Thwomps serve as obstacles within the course. Unlike normal Thwomps, the flashing type can wipe out racers by touching, in addition to crushing. Using the Star, the racers can prevent for being hit, even though these thwomps cannot be defeated even with this Item.

Super Mario Kart composer Soyo Oka considers the theme for this level one of her favorites among her compositions.

Mario Kart 64
For Mario Kart 64, Rainbow Road is the longest race course of the game, having 2.000 meters in lenght and a time around two minutes a lap. The track features a transparent multi-colored path, containing also Star-shaped rails running throughout the course. There are neon-light pictures of the eight playable characters, plus a portrait of a Boo and a Mushroom in the distance, floating in the void. Moreover, a big tri-dimensional smiling Star lies in a section of the track. Roving Chain Chomps, which they seem "sliding" along the track, follow the course in reverse, tossing any driver who makes contact into the air.

The twisting course starts with a huge drop that leads racers uphill thereafter, to cross a rainbow ring halo. After crossing the ring, racers can behold the flashing neon portraits while run through a pigtail bridge, following then towards another drop, less deep than the first one. Racers turn around a corkscrew to reach a hairpin bend, and then a twisting stretch to go back to the checked line finally.

A timed hop during the drop at the beginning can work as a shortcut, by jumping to the side where a section of the track can be seen to land over there.

Mario Kart: Super Circuit
In Mario Kart: Super Circuit, Rainbow Road has rails at the start line. Edges of the course are lined with bounce-jumps. Astute racers can use Mushrooms to perform significant shortcuts. The track has falling stars that can make racers spin out and Thunder Clouds that will shrink anyone careless enough to drive under them. The Bowser's Castle from Paper Mario can be seen in the background. This track is equal with the course of Rage Racer Overpass City. This game also features the Rainbow Road course from Super Mario Kart without the flashing Thwomps.

Mario Kart: Double Dash!!
Dash Panels give a boost of speed to the racers in the Mario Kart: Double Dash!! version of Rainbow Road. This version of Rainbow Road also has rails in parts of the course. It features a helix and a pipe that shoots players to the highest point of the track after reaching the very bottom. It also contains floating sculptures of items, and rains stars that racers can pick up. It has the most pearl-like colors of all the Rainbow Roads. Additionally, the entire course is placed high above a city. The city it floats over could be Mushroom City because of the design of some of the buildings. When in split screen mode, the city and the item sculptures are removed. The theme music played in the course is a remix of the Rainbow Road from Mario Kart 64, and reappears in Super Smash Bros Brawl as an alternative music theme for the Mario Circuit battle stage.

Mario Kart DS
The Rainbow Road of Mario Kart DS has several rails on certain curves and includes a loop and a corkscrew. Those elements may have been added to ensure challenge; players can place items so their opponents could fall off the corkscrew or the loop. Some multi-colored Pipes and Stars appears in the surroundings of the stage. Additionally, the coloring pattern of this looks different from the other previous Rainbow Roads: here, the stripes on the track follow along it, instead of crossing the track.

Mario Kart Wii
The Rainbow Road of Mario Kart Wii is a new version of the rainbow-colored track. The track is located over the Earth's stratosphere, mainly showing the eastern parts of North America, as well as parts of Europe, Africa, and South America. The course begins a 90 degrees slope, located once after the starting line. Multiple curves and trick pads appear, the course features also a launching point, where players are shot away by a stylized Launch Star. The track shows a reminiscent of the Rainbow Road of Mario Kart DS, while visual style is based on Super Mario Galaxy. Star Bits appear in the background of the course. A corkscrew reappears not far from that Launch Star. Further cementing the fact it was inspired from Super Mario Galaxy is the fact the ghost is Princess Rosalina, and a Launch Star pattern is seen on the rails.

Mario Hoops 3 on 3
Rainbow Road is the unlockable third dribble race from the "challenges" section in the basketball game Mario Hoops 3 on 3. However, this Rainbow Road floats above the clouds and around a clock tower, and not much of the course is fully seen when playing. Podoboos and Bombs come out of holes similar to Bowser Castle.

Trivia

 * F-Zero X has a track named Rainbow Road. It imitates the Mario Kart 64 version of the Rainbow Road, having the same map of the track, and following it basically. It is described as a "Psychedelic Experience". Parts, though not all of it, are rainbow-colored. Unlike the original, it has no barriers in certain areas, and the neon Mario series decor is missing - instead, it just has a plain black background with a watery blue bottom to which careless drivers may fall. In addition, when racing the track with the 64DD expansion features, the background song is a heavy metal version of the Rainbow Road song heard in MK64. Of course, there aren't any Chain Chomps.
 * Rainbow Road is the only track in Super Mario Kart which is not numbered.
 * A portion of Good Egg Galaxy's music (from Super Mario Galaxy) is heard on Mario Kart Wii ' s Rainbow Road to match the enviroment of this course.