Rainy Mansion is a haunted-house themed race course found in Echo Forest. The race course takes place within a creaky old broken mansion with mirrors, spiderwebs and broken flooring. On the later courses, the paths will lead outside into the fog covered forest where it is rainy and gloomy. Racers will race across a graveyard to eventually loop back into the interior of the mansion and back to the start.

Trivia

• It is the only race where the Short Course is 2 laps long.
• The Normal Drag Race is based off this course's exterior.
• There are a lot of sharp bends within the race; when taking corners, make sure you take them slow and corner sharply to prevent crashing into walls.
• There are plenty of pseudo-shortcuts in the Large Course you can take by cutting through the graveyards.
• In every course, there is a room with broken floorboards. Do not fall down the gaps as you will end up losing time taking the long way out. To avoid falling, it is recommended to jump across the gap with the Jumping Heli.