Mii Plaza Speedway is the first track of the Mushroom Cup in Mario Kart 9.
Mii Plaza Speedway is an open roof stadium lined with Mii spectators. The track is plain road, but the inside has a grass and tile setup like that of Mii Plaza. The track is mostly square, except for a section at the bottom that leads to a triangular section of road that circles a large fountain, with a statue of a random Mii saved on your device. All advertisements are Miiverse posts.