Share Your Difficult Mario Kart PC Tracks/Arenas!

MKPC's Tracks and most custom ones made by us aren't really difficult, but here, we're focusing on really tough tracks. So, here's mine!
Mt. Lavalava: https://mkpc.malahieude.net/map.php?i=198853

Can really hard challenges count?
https://mkpc.malahieude.net/map.php?i=204730

Eh, don't see why not.

This is a tortuously difficult track much harder than the old version: Lich Labyrinth

Rainbow Rush isn't just tough, it's ragebait. My big bro wanted to snap his keyboard after finally beating it on the 26th attempt.
The key?