Plessie's Raging River is the second track of the Mushroom Cup in Mario Kart 9.
Plessie's Raging River is similar to the stage Plessie's Plunging Falls in Super Mario 3D World. The players start out on a small grassy knoll before heading out to a wooden bridge that drops out, sending them to the long river. There are several Splounders that the player can bounce off of and do tricks. The problem is there are several walls of water that can block the path. Eventually the river drops out and the players glide over a large waterfall, which takes them back to the grassy knoll, ending the lap.