Editing Wii Grumble Volcano

'''Grumble Volcano''' is the fourth and last course of the [[Star Cup]] in ''[[Mario Kart Wii]]''. It takes place around a volcanic area covered with [[lava]]. The course features many jumps and moving platforms, as well as many sharp corners. At certain times, sections of the track will crumble away into the lava, making the road smaller and harder to drive around. The track's music is very similar to that of [[World 8 (New Super Mario Bros.)|World 8]] in ''[[New Super Mario Bros.]]''

The course takes place inside and around an active [[volcano]] surrounded by endless lava. There are also many huge rock formations around the course, with [[? Block]]s and [[Brick Block]]s lodged in them. At the beginning of the track, racers go off a simple ramp and briefly drive straight, where they reach the first set of [[Item Box]]es. They then enter the volcano and take a slight left turn followed by a right turn. This brings them to another ramp followed by the first of several stone platforms; each platform will move left and right across the lava and has a pair of Item Boxes on it. Racers then take a slight right turn and a slight left turn as they enter a cave adjacent to the volcano, where there is a split path and another item set. Both paths involve a right U-turn followed by a left U-turn and then a right turn, though the left path is higher up. As racers exit the cave, there is another ramp and another stone platform, followed by a small piece of normal track and then one last platform.  

[[File:MK8-Course-Wii GrumbleVolcano.jpg|250px|left|thumb|{{classic|Wii|Grumble Volcano}} in ''Mario Kart 8'']]

Grumble Volcano makes its classic course debut in ''[[Mario Kart 8]]'' and ''[[Mario Kart 8 Deluxe]]'' as the third race of the [[Lightning Cup]]. Its layout is mostly retained but has several notable changes. There are two [[Glide Ramp|glide ramp]]s, one on the second stone platform and one at the end of the left path at the end of the track, replacing its dash panel ramp. An additional chunk of the track right after the first dash panel ramp sinks into the lava. [[Volcanic debris]] falls more slowly than in the original course, and chunks of the course start shaking and sinking sooner into the race. The course geometry has also been modified along the right path at the end of the track, enabling a new shortcut that functions similarly to the shortcut that skipped the final turn in the original iteration. In this case, it cuts off the turn but is blocked by a large rock formation until lap 3. Lastly, most Item Boxes have been removed, with exception of the first and second full item sets. Instead, there is a set along the gradual right U-turn next to the dash panel ramp. Double Item Boxes also appear at the second and last item sets in ''Mario Kart 8 Deluxe''. Visually, the clouds in the sky appear to be more orange than purple as opposed to in the original version. The volcano that the players drive through as well as the volcanoes in the background now have lava running down them. The starting banner has been changed, now resembling a slightly deteriorated structure with torches added and the modern ''Mario Kart'' logo. Similar to {{classic link|Wii|Mushroom Gorge}}, {{classic link|3DS|Neo Bowser City}}, {{classic link|3DS|DK Jungle}}, and the stadium and museum portions of {{classic link|Tour|Madrid Drive}}, the music remains mostly unchanged, but the guitar and sitar have been updated and the mastering has been tweaked.

|Jpn=グラグラかざん

|JpnR=Guragura Kazan

|JpnM=Rumbling Volcano