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Borderlands 4

All Vault Key Fragment Locations in Borderlands 4: Complete Regional Guide

A complete Borderlands 4 route for all nine Vault Key Fragments, with landmark directions, Vault entrances, rewards and a warning about the conflicting Terminus Range report.

By VGSources Team 4 min read
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Borderlands 4 has nine Vault Key Fragments: three in Fadefields, three in Carcadia Burn and three in Terminus Range. Each region’s fragments make a separate key, so pieces cannot be combined across regions. Collect all three in one region to reveal its Vault marker, then insert the key to open the purple portal and begin the Vault encounter.

One Terminus Range location is disputed by published September 2025 guides. The two reported positions are listed separately below; verify the marker in your current game before committing to a long trip.

How fragments and Vaults work

  • Fragments are dark brown to nearly black pieces marked with yellow lightning.
  • Entering the circular search area on the map activates a proximity bar. Its four segments fill as you approach the fragment.
  • Nearby Order Silos can reveal a fragment’s general area, but activating a Silo is not required to collect a fragment.
  • Only the three fragments from the same region form that region’s key. The Vault marker appears after all three are collected.

At a revealed Vault, approach the mechanism, insert the regional key and enter the purple portal. The encounter consists of three enemy arenas followed by a Guardian fight in a fourth arena. Vaults are intended as challenging combat activities, so bring a build with reliable survivability and damage for extended encounters.

Fadefields fragments and the Arch of Inceptus

1. Coastal Bonescape

Travel to Stillshore in the southwest corner of Coastal Bonescape. On the island near the water, search the base of the tower. The fragment is sitting on a crate.

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2. The Howl

Go to the small cave northeast of The Launch Pad and southwest of Ardor’s Bounty. Odd-shaped pillars help identify the spot; the fragment rests on a pedestal inside.

3. Idolator’s Noose

Enter Rosemary’s Reserve northeast of Idolator’s Noose and locate the Propaganda Tower. Grapple to the loose vent, pull it away and enter the nook behind it to collect the fragment.

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Arch of Inceptus

The Fadefields Vault is on a cliff east of Fadefields. Grapple up, clear the mangler nest and follow the newly accessible route to the Vault entrance. The reported completion reward is faster glide-pack regeneration.

Carcadia Burn fragments and the Arch of Radix

1. Lopside

Reach the One Pumper gas station on the western edge of Lopside, south of the Makeshift Chalet safehouse. Grapple onto the roof; the fragment is between the tables.

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2. Ruined Sumplands

From the Judgement’s Lapse Silo area, head downhill toward the water in northern Carcadia Burn. Outside Hull’s Handbasket, look for the pedestal near the shoreline.

3. Tonnage Peel

At the Wreck of the Last Great Hope, far west of The Lowrise safehouse, enter the shipwreck tunnel. Near the red light, pull up the floor hatch and drop into the cave below to find the fragment.

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  • FIGHT SOLO OR CO-OP: Wreaking havoc across Kairos is awesome alone and even better with friends in 2-player splitscreen or up to 4-player online co-op.* Borderlands 4 is designed for co-op from the ground up; whether you're hunting for loot, tackling missions, or wandering freely, level scaling and individual difficulty keeps the party together and having fun.
  • LESS BORDERS, MORE LANDS: Freely explore a vast and dangerous world rife with warring factions. Hop on your hover bike and ride through lush fields, towering peaks, and deadly deserts full of fearsome enemies, dynamic events, and engaging quests with unforgettable characters. Unite the people of Kairos and ignite a revolution, tackling this adventure however you see fit in a seamless Borderlands experience.

Arch of Radix

Arch of Radix sits in the sandy plain in the northwest corner of Grindstone of the Worthy. It is east of The Lowrise safehouse and north of the Rustical Hurl Silo. The reported completion reward is a shorter glide-pack regeneration delay.

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Terminus Range fragments and the Arch of Origo

1. Vestal Garrison

Enter the garrison and turn left through the next door. Climb the small staircase to the command room; the fragment is on a crate beneath the large monitor.

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  • BE A BADASS: Become an unstoppable force of battle, blasting through enemies with an all-new arsenal of outrageous weaponry. Move across the Borderlands like never before—double jumping, gliding, dodging, grappling, and more—dealing death from every direction. Explode each encounter with devastating Action Skills that unleash your Vault Hunter's unique abilities. Craft your perfect build with branching skill trees and a deep, rewarding loot chase full of wild weapons and powerful gear.
  • FIGHT SOLO OR CO-OP: Wreaking havoc across Kairos is awesome alone and even better with friends in 2-player splitscreen or up to 4-player online co-op.** Borderlands 4 is designed for co-op from the ground up; whether you're hunting for loot, tackling missions, or wandering freely, level scaling and individual difficulty keeps the party together and having fun.
  • LESS BORDERS, MORE LANDS: Freely explore a vast and dangerous world rife with warring factions. Hop on your hover bike and ride through lush fields, towering peaks, and deadly deserts full of fearsome enemies, dynamic events, and engaging quests with unforgettable characters. Unite the people of Kairos and ignite a revolution, tackling this adventure however you see fit in a seamless Borderlands experience.

2. The Low Leys

Near The Pit, east of the Carcadia Burn entrance, look for the houses on stilts and the curved tree with pink leaves. Climb behind the tree and grapple to the ledge, where the fragment sits on a pedestal.

3. Conflicting reports: Cuspid Climb or Windspear

Published guides disagree on this fragment. One report places it in Cuspid Climb, in a cave reached from The Reliquary Silo by taking the balloon lift and continuing to the northern outcrop. Another places it in Windspear, inside an enemy base. Because the discrepancy was not resolved, check your current in-game map and objective marker before following either route; do not assume that one description applies to every game version.

Arch of Origo

The Terminus Range Vault is reported at the Low Leys–Cuspid Climb border. From the Heritage Opus safehouse, cross the bridge north into Low Leys, locate the ledge across the ravine, jump over and enter the cave behind the shrine. The reported completion reward is a 50% reduction in glide-pack cost. Area names around the disputed fragment and Vault should be checked against your current in-game nomenclature.

Regional route at a glance

Region Fragments Distinct navigation features Vault
Fadefields Coastal Bonescape; The Howl; Idolator’s Noose Island tower crate, cave pedestal and a vent-hidden nook Arch of Inceptus
Carcadia Burn Lopside; Ruined Sumplands; Tonnage Peel Gas-station roof, shoreline pedestal and shipwreck floor hatch Arch of Radix
Terminus Range Vestal Garrison; The Low Leys; third location disputed Indoor command room, grapple ledge and a conflicting third report Arch of Origo

Fast, reliable collection method

  1. Open the regional map and travel to the named landmark for one fragment.
  2. Enter the marked search circle and follow the proximity bar until all four segments indicate that you are close.
  3. Inspect vertical routes, caves, rooftops and interactable cover rather than searching only at ground level.
  4. Collect all three fragments in that region before moving to another region; mixed-region fragments will not form a key.
  5. When the Vault marker appears, travel to it, activate the key mechanism and enter the portal.
  6. Clear the three standard arenas, then defeat the Guardian in the fourth arena.

If a fragment is not appearing

  • Confirm that you are in the correct regional landmark; similarly named locations can be far apart.
  • Use the proximity bar, not just the map circle, to determine whether you are on the correct elevation.
  • Check rooftops, hatches, vents and grapple points described in the route notes.
  • Activate a nearby Order Silo only if you want an additional area hint; it is optional.
  • For the third Terminus Range fragment, compare both Cuspid Climb and Windspear reports with the live in-game marker, since the published locations conflict.
  • If a route differs from these descriptions, remember that the cited guides were published in September 2025 and may lag a game update.

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