Sky Mountain (along with Starry Skies) is the the seventh world in Newer Super Mario Bros Wii. It is one of the smallest partial world in the game. It’s last level has the starry skies as it’s goal pole setting.
Sky Mountain is similar to World 6 from New Super Mario Bros Wii, a mountain/cliff world. It is to the left of Mushroom Peaks. The place has many Shy Guys. It takes place on the mountains of mushroom peaks.
7-1: Shy Guy Peaks
7-2: Paratroopa Peaks
Mushroom Peaks is connected to here.