ModsFinder

Underground Rivers

by Apollo

Underground Rivers generates rivers beneath the surface of Minecraft worlds, with entrances that connect them to the terrain above.

FabricForgeNeoForgeServer-side onlyMIT LicenseOpen source1.20.1 – 26.2

What it does

The mod adds underground river systems to new worlds. It is a rewrite of an earlier version, and its entrances and layouts vary more between locations. Lithostitched is required, and Fabric API is needed on the Fabric loader. It is server-side only, so players join without installing anything, and the code is under the MIT License, making it open source.

Key features

  1. Underground river generation

    Rivers run through caves and stone layers below the surface, separate from the standard terrain.

  2. Varied entrances

    Openings from the surface into the underground rivers differ in shape and placement across the world.

  3. Compatibility with other worldgen mods

    Lithostitched lets the mod work alongside other world generation mods such as Biomes O' Plenty, Nature's Spirit and Terralith.

Compatibility

Latest build for each game version and loader.

26.x4 of 4 versions with builds
26.21.0.3-fabric-26.2Not available1.0.3-neoforge-26.2
26.1.21.0.3-fabric-26.1Not available1.0.3-neoforge-26.1
26.1.11.0.3-fabric-26.1Not available1.0.3-neoforge-26.1
26.11.0.3-fabric-26.1Not available1.0.3-neoforge-26.1
1.21.x9 of 9 versions with builds
1.21.111.0.1Not availableNot available
1.21.71.0.1Not available1.0.1
1.21.61.0.01.0.01.0.0
1.21.51.0.01.0.01.0.0
1.21.41.0.01.0.01.0.0
1.21.31.0.01.0.01.0.0
1.21.21.0.01.0.01.0.0
1.21.11.0.3-fabric-21.11.0.01.0.3-neoforge-21.1
1.211.0.01.0.01.0.0
1.20.x1 of 1 version with builds
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 2

LithostitchedLibrary mod with new configurability and compatibility enhancements for worldgen
Required
Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

Questions

Does Underground Rivers need Lithostitched?

Yes. Lithostitched is a required dependency, and Fabric API is also required on Fabric.

Does a player need the mod to join a server?

No. Only the server needs it, and players join without installing anything.

In the catalog

Underground Rivers is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 13,894 mods support Minecraft 26.2.

World generation mods8,515Fabric modsMods for 26.213,894

More from Apollo

All projects
Lithostitched1.20 – 26.3Tectonic1.18.2 – 26.3Regions Unexplored1.18.2 – 26.1.2Abridged1.20.1 – 26.2Improved Village Placement1.20.1 – 26.2Reintegrated: Chipped1.20 – 1.21.1

Similar mods

Biomes O' Plenty1.7.10 – 26.3Cobblemon1.19.2 – 1.21.1Terralith1.18.2 – 26.3YUNG's Better Nether Fortresses1.18.2 – 26.1.2Dungeons and Taverns1.19 – 26.3Yeetus Experimentus1.18.2 – 26.3

What the author says

Underground Rivers is a worldgen mod that adds underground rivers to your world. Tectonic has underground rivers as a feature, but this mod adds them to vanilla terrain with no other changes. They're a complete rewrite from the ground up, meaning there's better entrances and more variation then ever before!
Apollo, on the Modrinth page

Official listing

Owner
Apollo
Published
2024-09-23
Updated on Modrinth
2026-07-10
Facts verified
2026-10-15

Tags

AdventureWorld generationTransportation
Open on ModrinthCompare