How to reach the Putrified Ducts in Hollow Knight: Silksong

The Putrified Ducts in Hollow Knight: Silksong isn't the loveliest region in the game, or the easiest to traverse, but don't skip it if you wish to obtain handy tools like the Longclaw and the Wreath of Purity. The biggest hurdle, however, is finding the entrance to the Putrified Ducts. As shown on our Silksong interactive map, this hidden region is situated in the northeastern corner of Pharloom, but it doesn't come with a front door.

Including two potential routes, here’s how to reach the Putrified Ducts in Hollow Knight: Silksong.

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How to enter the Putrified Ducts through Memorium

The first and most common way to reach the Putrified Ducts, is to jump through the narrow passage leading from the Choral Chambers into the Memorium region.

Sounds simple enough, but there’s a catch: You must use the Faydown Cloak’s double jump ability to reach this passage.

If you decide to try this route, you must complete the following steps:

• Explore the Choral Chambers. Optionally, unlock the Grand Bellway Station and Grand Bellway Ventrica Station, as well as the Ventrica Station at the First Shrine (Songclave). This will make it easier to travel to the Memorium passage.
• At the bottom of the Choral Chambers, descend into Whiteward and the Underworks. At the heart of the Underworks region, get the Clawline ability. The Underworks also host various spool fragments and craftmetal locations, so it's an important region to unlock anyway.
• Once you’ve got the Clawline, enter The Slab through the passage northwest of the Citadel Spa. Find the Bellway station in the lower area, and head west into Mount Fay (you don’t need to get kidnapped and dropped in The Slab region for this).
• Reach the top of Mount Fay, where you’ll receive the Faydown Cloak, thus unlocking the ability to double jump. You might want to pair this with the "Liquid Lacquer" quest, which is obtained in Bellhart after completing "My Missing Courier" and "The Great Taste of Pharloom," and leads you to the top of Mount Fay as well.

Once you’ve jumped through the vertical passage into Memorium, break the ceiling to reach the larger chamber and take the second-lowest exit to the right. Keep going until you reach another large chamber and drop down. Enter the room with the wooden sign.

Inside this room, you might want to pay 70 rosaries to the machine to obtain the Memorium map. To continue your journey to the Putrified Ducts, jump towards the grey curtains on the ceiling to find a secret passage.

Drop down from the balcony, cross the bridge, and hit the breakable wall on the other side (which requires the double jump). Inside the room with the spikes, double jump again to reach the passage above you. This passage will lead you right into the Putrified Ducts.

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How to enter the Putrified Ducts through Bilewater

Alternatively, you may enter the Putrified Ducts from the Bilewater region in the south.

Beware that the journey through Bilewater seems a lot harder than the one through the Memorium path (due to a multitude of enemies, tricky parkour, and an even trickier boss fight), so I recommend the latter. As it seems impossible to proceed through Bilewater without the Faydown Cloak’s double jump, the preparation phase for both routes is the same.

If you still prefer to enter the Putrified Ducts through Bilewater, here’s what to do:

• Enter the Sinner’s Road region above Greymoor.
• Walk east until you reach the bench sign in the vertical chamber, where you might want to rest. Beware that the bench is broken, but you can fix it by breaking the wall above the bench (left side) and completing a brief parkour run.
• Leave the vertical chamber through the ceiling and head east. Destroy this wall to enter Bilewater:

• Go right until you find the massive vertical chamber. On the left side of this chamber, use double jump to enter the narrow passage.
• Parkour your way up, then take the upper road to the east when you can go no further. Follow the path as it loops back to the upper left, where you'll find the Groal The Great boss (whom you also need to defeat to reach Act 3).
• Defeat him, leave the boss arena to the left, and jump up to enter the Putrified Ducts.

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Looking for more Silksong help? Check out our essential beginner tips and top rosary bead farming locations if you're just getting started, and if you're running up against a few locked doors, our simple key locations guide is the one for you.

While you're exploring and completing quests like the "Rite of the Pollip" wish or "Silver Bells" request, make sure to spend some time progressing the main story as well, as you'll get some upgrades that make battles easier. After "The Threadspun Town" quest, for instance, you can upgrade your needle to deal more damage.