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The Augur Mines in Borderlands 4 are some of the most rewarding side activities you can tackle. These mines are packed with dangerous creatures, tough bosses, and plenty of loot to grind for. They’re also a reliable way to farm SDU Tokens and unique weapons — though, as with most things in Borderlands, drops are RNG-based, so you may need to re-run them multiple times.

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Before you can access the Augur Mines, you’ll need to complete the Shadow of the Mountain Main Mission. This is a mandatory prerequisite, so expect to spend some time progressing through the story first.

Once unlocked, here’s where you can find all seven Augur Mine locations in Borderlands 4, along with the bosses you’ll encounter and the loot they drop.

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All Augur Mine Locations in Borderlands 4

1. Timid Kyle’s Neglected Opening (Fadefields)

• Location: North of the Old Safehouse in Coastal Boenscape.
• Boss: Voraxis.
• Drops: Darkbeast, Potato Thrower IV.
• Tips: Don’t jump straight into the hole — follow the cave path to reach the entrance.

2. The Claim (Dissected Plateau, Fadefields)

• Location: Near Zadra’s secret hideout.
• Boss: Backhive.
• Drops: Triple Bypass, Rallying Stop Gap.
• Tips: Expect dense enemy waves before reaching the boss.

3. Whistler’s Maw (Terminus Range)

• Location: Inside a cave system in Terminus Range.
• Boss: Shadowpelt.
• Drops: Slippy, Eviscerating Vamoose, Centering Weatherproof Sparky Shield.
• Tips: Break its shield quickly, then use heavy-hitting weapons to finish it.

4. Embossed Fault (Grindstone of the Worthy)

• Location: Next to a wall near Dominion.
• Boss: Skull Orchid.
• Drops: Spied Dextrous Oak-Aged Cask, Roach.
• Tips: Watch out for Skull Orchid’s ability to change elemental attack types.

5. Trinket Crevass (Ruined Sumplands)

• Location: Beside a cliff in the Sumplands.
• Boss: Rocken Roller.
• Drops: Whispering San Saba Songbird.
• Tips: Keep constant pressure — Rocken Roller’s first HP bar can regenerate.

6. Bittervein (Stoneblood Forest, Terminus Range)

• Location: Deep inside a tricky cave system full of platforming sections.
• Boss: Bramblesong (an oversized Kratch).
• Drops: Ohm I Got, Convergence, Disco.
• Tips: Bring mobility skills to handle the jumping segments.

7. The Toil of Spoiling Vis (Dominion, Carcadia District)

• Location: Late-game area, across the bridge left of the Carcadia safehouse.
• Boss: Axemaul.
• Drops: Armored Bod, Buzz Axe.
• Tips: Axemaul is a massive hound-like beast wielding an axe in its mouth — prepare for a brutal fight.

The Augur Mines in Borderlands 4 offer a mix of exploration, tough fights, and rewarding loot grinds. Whether you’re farming for legendary weapons, shields, or SDU Tokens, these mines are well worth your time. Just remember: RNG rules all in Borderlands, so patience is key if you’re chasing specific gear rolls.