The Booster Course Pass is a paid downloadable content expansion for Mario Kart 8 Deluxe on Nintendo Switch, developed by Nintendo EPD Production Group No. 9 and released in 2022. It adds 48 additional race tracks drawn from across the Mario Kart series, substantially expanding the base game's roster. The selection includes courses inspired by real-world locations, such as Tour London Loop and Tour New York Minute, alongside returning tracks from previous entries like Wii Maple Treeway and Merry Mountain. The expansion also reintroduces half-pipes to Mario Kart 8 Deluxe, terrain features that allow racers to become airborne, perform tricks, and earn speed boosts upon landing. The content is delivered across multiple waves, making it one of the largest post-launch additions to a Mario Kart title.