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?

This one is one of mine:

https://mkpc.malahieude.net/circuit.php?id=223236