The Sewer Key Comes From Gunther at the Museum

The Sewer Key in Stardew Valley is a reward from Gunther, the museum curator in Pelican Town. You unlock it by donating 60 items to the museum's collection. The items can be anything the museum accepts: artifacts, minerals, or gems. Once you hit 60 donations, Gunther will give you the key automatically during the next time you visit the museum.

The sewer key opens the locked door in the sewers south of town, which leads to the Mutant Bug Lair and other areas. Without it, that entire section of the map stays closed to you.

Key Takeaways

  • You need to donate exactly 60 items to Gunther's museum collection to receive the sewer key.
  • Any artifact, mineral, or gem counts toward the 60 — you do not need specific items, just volume.
  • Donations happen at the museum counter; Gunther will hand you the key once you cross the threshold.
  • The fastest way to reach 60 is to dig in the mines, fish for artifacts, and break open geodes early in your first year.

Where to Find 60 Items to Donate

The easiest source is the mines. Every floor drops minerals and gems when you break rocks with your pickaxe. In the first 40 floors (the copper and iron sections), you will collect far more than you can use. Donate everything that is not a gem you want to keep for crafting or selling.

Fishing also yields artifacts regularly. Cast your line in any body of water and you will pull up treasure chests and artifacts alongside fish. The beach and rivers are reliable sources. You do not need to be a high-level fisherman — even poor catches include artifacts.

Breaking open geodes with a hammer at Clint's blacksmith shop gives you minerals and gems. You find geodes in the mines and in artifact spots (the little dark patches on the ground that you dig with your hoe). Each geode breaks into 1 to 3 items, so a few dozen geodes will push you toward 60 quickly.

Artifact spots themselves are another source. Dig them up with your hoe and you will find bones, pottery shards, and other artifacts. They respawn daily in different locations, so revisit the same areas each morning.

How Fast You Can Get the Key

Most players reach 60 donations by the end of spring or early summer of year one. If you focus on mining in the first month and donate everything you find, you can have the key by late spring. Casual players who donate as they go usually unlock it by mid-summer.

The speed depends on how much time you spend in the mines and how many geodes you break. A single mining session of 2 to 3 hours in the early mines can net 20 to 30 items. Three or four sessions will get you to 60.

What Happens After You Donate 60 Items

Gunther will call you over the next time you enter the museum and hand you the sewer key without fanfare. You can then walk south from town (past the blacksmith) and unlock the sewer door. The sewers connect to the Mutant Bug Lair and lead to other areas of the map you could not reach before.

Donating items beyond 60 continues to fill the museum's collection and unlocks additional rewards, but the sewer key is the main unlock tied to that specific threshold.

Items That Count and Items That Do Not

Artifacts, minerals, and gems all count. This includes items like bone flutes, ancient pottery, quartz, amethyst, topaz, and every other museum-may be able to access item. You can see what counts by looking at the museum's donation list on the wall.

Items that do not count include weapons, tools, clothing, seeds, and food. Selling items or keeping them in your inventory does not prevent you from donating them later — you can donate the same type of item multiple times as long as you have separate copies.

Mining Strategy to Reach 60 Quickly

Head into the mines on a day when you have full energy and no other plans. Bring a pickaxe, a sword, and some food to restore health. Break every rock you see and collect the minerals and gems. Ignore the ore itself if you are only chasing donations — focus on the gems and minerals that drop.

Floors 1 to 40 are the easiest and safest. You will encounter weak enemies and find plenty of materials. Do not go deeper until you have a better sword and more health, because the difficulty jumps sharply after floor 40.

If you find geodes, bring them to Clint at the blacksmith. He charges 25 gold per geode to break them open. The items inside count toward your 60, and the cost is worth it if you are trying to unlock the key quickly.

Frequently Asked Questions

Do I have to donate 60 different items, or can I donate the same item type multiple times?

You can donate the same type of item multiple times. If you find five amethysts, you can donate all five and each one counts toward the 60. The museum does not require variety, only volume.

What if I accidentally sold an item I wanted to donate?

You can find more. Minerals, gems, and artifacts respawn or drop regularly from mines, geodes, fishing, and artifact spots. You will not run out of things to donate before you hit 60.

Can I get the sewer key before spring ends?

Yes, if you mine heavily in the first few weeks. Most players who focus on the mines in early spring and donate everything they find will unlock the key by late spring or early summer.

Does the sewer key open anything else besides the sewers?

The sewer key only opens the locked door in the sewers south of town. It does not unlock other areas or chests elsewhere on the map.