Where can you find Lost Rex in ARK: Survival Ascended?

Check the interactive spawn map on the Lost Rex spawn location page for exact spawn zones across all ARK maps. Spawn density and locations vary by map.

How long does it take to raise a baby Lost Rex?

A baby Lost Rex takes 3 days and 20 hours to reach full maturity. Use a breeding calculator for imprint timing and food requirements.

Lost Rex Taming, Breeding & Spawns - ARK: Survival Ascended

Lost Rex

VARIANT

Lost Rex

Spawn Command

Information

Level

Preset

Official servers currently have boosted rates! You don't need to change settings in our calculator.

Base Settings

Variant

Taming Speed

Spawn Locations

Lost Rex does not currently spawn on any ARK: Survival Ascended map, or spawn data is not yet available.

Taming

Lost Rex is not tamable.

Breeding

Open Calculator →

TypeLive Birth

Maturation Time3d 20h

Quick Info

Saddles

Rex SaddleLv.74

Rex Tek SaddleLv.?Tek

Carried By

Immobilized By

XP Calculator

Full Calculator →

Kill XP

Wild Kill (1.25×)

Creature Level

Kill Count

Per Kill2,385 XP

30 base × 15.9 level × 4 × 1.25× wild kill × 1× server

Server Settings(Game.ini)

Official servers use non-1× defaults for kill-type multipliers. Adjust these if your server uses custom Game.ini values.

Server XP

Wild Kill

Tamed Kill

Alpha Kill

Cave Kill

Boss Kill

Saddle Crafting XP

Rex SaddleBase: 86 XP · Lv.74

344 XP

Rex Tek SaddleTekBase: 86 XP

344 XP

Base × 1× quality × 4 × 1× server

Drops & Harvest Resources

Harvesting a dead Lost Rex yields Hide, Raw Meat, Raw Prime Meat. The corpse has 520 harvest health, allowing multiple hits before it's fully depleted.

Different tools yield different quantities - check the table below to pick the right tool for the resource you need. Generally, a Pick favors meat while a Hatchet favors hide and secondary materials.

Harvest Body HP

Melee Damage

Weapon Damage

Harvest Multiplier

Resource	Pick	Hatchet
Hide	40%~21~17 hits	60%~32~13 hits
Raw Meat	60%~24~17 hits	40%~16~13 hits
Raw Prime Meat	3%~1~17 hits	2%~1~13 hits
Tyrannosaurus ArmDrop	—	—
Rex Bone HelmetDrop	—	—

Estimates based on game-extracted data (weights, quantities, harvest multipliers, damage type chains). Each harvest event independently rolls each resource - higher weight = higher drop chance. Actual yields vary with RNG.

Damage Resistances

The Lost Rex has 14 damage type modifiers that affect incoming damage. With 7 resistances and 6 weaknesses, its biggest vulnerability takes +400% extra damage - exploit that for faster kills. See the full breakdown in the table below. Values under 100% indicate resistance, above 100% indicate weakness.

MiningDrill Harvest

0%-100%

Dino AttacksStandard dino melee hits

50%-50%

Plant Species XPlant turret projectiles

50%-50%

Herbivore DinoHerbivore dino attacks

60%-40%

Stone WeaponsClub, slingshot (high torpor)

66%-34%

GenericFall damage, environmental

70%-30%

Base Stats

Full Stats →

Stat	Base (Lv.1)	Wild +/Lv	Tamed +/Lv
Health	1100.0	+220.00	+4.00%
Stamina	420.0	+42.00	+2.00%
Torpidity	1550.0	+0.00	+0.00%
Oxygen	150.0	+15.00	+2.00%
Food	3000.0	+300.00	+2.00%
Weight	500.0	+10.00	+0.80%
Melee Damage Multiplier	100.0%	+5.00%	+10.00%
Speed Multiplier	100.0%	+0.00%	+1.00%

Hitbox Multipliers

Aiming matters - the Lost Rex has 1 hitbox region with distinct damage modifiers. Hit the Head (1.5x multiplier) for the highest damage per shot.

HeadCnt_Jaw_JNT_SKL

1.50x

Can Damage

The Lost Rex can damage: Thatch, Wood. It can break through Thatch and Wood, so upgrade to Stone at minimum for protection.

Thatch

Wood

Stone

Metal

Tek

Tools & Guides

Taming CalculatorFood, narcotics, and time for any level

Breeding CalculatorMaturation, imprint timers, raising costs

BuildingsCommunity traps, pens, enclosures

AbilitiesAttacks, harvest specs, unique skills

Tips & TricksCommunity strategies and advice

Spawn LocationInteractive maps with spawn zones

Spawn CommandAdmin commands, all variants

Lost Rex Tips & Tricks

Browse survivor-submitted tips and strategies for the Lost Rex.

This page is your complete guide to the Lost Rex in ARK: Survival Ascended. Below you'll find a quick overview of its base stats, taming method, breeding data, and harvest capabilities — plus links to dedicated tools like the taming calculator, breeding calculator, and interactive spawn map.

The Lost Rex starts with 1,100 base Health, 100% base Melee Damage, 500 base Weight. These base values scale with each wild and tamed level-up, so check the taming calculator to see exactly what stats you can expect at different levels.

The Lost Rex gives live birth after a gestation period. Babies mature in 3 days and 20 hours. Check the breeding calculator for detailed imprint schedules and raising costs.

Once tamed, the Lost Rex can harvest Hide, Raw Meat, Raw Prime Meat. Visit the information tab for the full harvest table with quantities and efficiency data.

Found throughout the ARKs, the Lost Rex is a carnivore creature in ARK: Survival Ascended. It falls within the Variant classification.

At 1,100 base HP, the Lost Rex is quite durable. Dealing 100% base Melee Damage, the Lost Rex brings solid damage output to the table. Its base Stamina of 420 gives it solid stamina reserves. It carries 500 base Weight - an enormous weight pool.

The Lost Rex roams the ARK as a wild, untamable creature. Killing a wild Lost Rex yields 30 base XP. It can be cloned at a Cloning Chamber for 0.87 Element plus 0.01 Element per level.

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