Bowser's Castle Slide: Redemption Run
If you wanted to learn more about upwarps in SM64, this is the level for you. All wrapped up in a Slide level based on a Mario Kart course. Like any Mario Kart course, there is 3 Laps with different obstacles to navigate and different upwarps to learn in order to progress laps. There is even bonus content after you beat the course in the time limit.