Wanna know where it is? Okay, so travel thro space (don't forget snacks, it can take a while) and land on planet Rilgar. Then, walk until the hoverboard races area. Be careful tho, the streets are filled with monsters, you gotta have a strong weapon equipments in order to make it thro.
For optimal chilling vibe, wait until the competitions ends and everyone left. You can then take a peak at some awesome posters in the gallery, while walking on some freshly used conffetis.