
X-Mountains
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X-Mountains
"Extreme Mountains" datapack for Minecraft
This datapack removes the 256 height limit to the new mountains (and world) generation of the overworld.
With 1.18 "Caves & Cliffs" update, mountains can go very high, in some cases above 250+ blocks!
If you love build very high towers on top of the mountains, and they are too high, there may be not enough space to build (the max build limit is 319).
To make things easier, avoiding terraforming before building, the actual world generation height is limited to 256 blocks, even if a mountain "wants go higher".
This is a good solution, but, for a bunch of blocks, there is an evident side effect: mountains higher that 256 are cutted off (like with a katana!) generating a flat unnatural area.
This is even more noticeable in a mountain range, in which all mountains are cutted at the same height, resulting in this:

Anyway, even without this limit, mountains rarely go beyond 290+ height, and there is still enough space to build (maybe not that 50-blocks height tower...).
After removing the top limit you can see the real majesty of this beautiful new mountain generation!
You will find more higher mountains without that unnatural flat area on top! Only peaks!

How to install
Step 1
Download the datapack zip file for your Minecraft version.
Step 2
Open Minecraft and click to create a new world.
Step 3
Before start generating the world click the "Data Packs" button from the "More" tab: it will open a new window.
Step 4
Drag and drop the downloaded zip file to that window, then activate the datapack by moving it on the right side.
(Make sure it is over the default datapack)
Step 5
Click "Done", create the world, and enjoy!
License
Copyright (C) 2021-2023 devpelux (Salvatore Peluso)
Licensed under MIT license.
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.20, 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
- Downloads as xmountains_1_20.zip
- Download size: 34 KB
- Download link checked 29 Aug 2026 — working
These come from our own check of the pack file, not from the source page.