SUBNAUTICA / TIPS

Mark Lost River Entrances

The deep cave system has multiple confusing access paths.

QUICK REFERENCEFirst SubnauticaReviewed 2026-10-28Reference / noindex
Original Volpedia schematic category illustration
OVERVIEW

Understanding Mark Lost River Entrances

The deep cave system has multiple confusing access paths.

This is an original reference for the first Subnautica. Your current depth rating, oxygen, available tools and navigation route determine when an objective is practical. Follow actual in-game PDA and Fabricator information for any values that vary by version.

PRACTICAL APPROACH

How to use this information

Use distinct Beacon names for entrances and waypoints.

COMMON MISTAKES

What to avoid

Relying on memory alone can send you into leviathan patrol areas.

CONTINUE ON VOLPEDIA

Related topics and walkthroughs

GUIDESLost River Step By Step Route

Explore Lost River without losing your vehicles

BIOMESBlood Kelp Zone

A dark biome with white bloodvine and connections toward Lost River.

EXPLORATIONDeep Brine

Some Lost River brine pools can harm an unprotected swimmer.

BIOMESInactive Lava Zone

A deeper volcanic region reached beyond Lost River, important for final progression.

LEVIATHANSJuvenile Ghost Leviathan

A younger Ghost Leviathan that guards sections of Lost River.

BIOMESLost River

An interconnected deep cave ecosystem with brine pools, fossils and alien-story routes.

PROGRESSIONLost River Preparation

Develop a vehicle and supply plan that supports extended deeper cave exploration.

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Independent Volpedia editorial encyclopedia about the first Subnautica, reviewed 2026-10-28. Unaffiliated with Unknown Worlds Entertainment. Category illustrations are original diagrams, not in-game maps, screenshots or exact creature portraits. No fabricated damage statistics, spawn probabilities or detailed map coordinates. References are documented privately and not shown as outbound research buttons.