Peach's Castle (Game Boy Color golf course)

Peach's Castle is the fifth course in Mario Golf'' for the Game Boy Color. After completing the other four courses' tournaments, Princess Peach will send the player an invitation to compete here. A rainbow gate will appear on the main map leading to a cloudy area where a Bob-omb Buddy will launch the player to a floating landmass with Peach's Castle on it. Here, the player meets Mario, Luigi, Baby Mario, Donkey Kong, Yoshi, Bowser, and Peach herself. The background of the course features domed hills and cylindrical clouds like those seen in some Super Mario World levels such as Yoshi's Island 1. Some of the holes are designed to resemble characters and objects from the Mario franchise, much like Mario's Star from the Nintendo 64 Mario Golf''. Small star-shaped bunkers appear prominently throughout the course, often populating its fairways.

The music that plays in front of the castle on the overworld is an arrangement of "Inside the Castle Walls", while the music on the course itself is the Super Mario Bros. "Ground Theme".