The Skull Cavern is effectively endless in Stardew Valley, so there isn’t a normal final level you can reach. In practice, players can keep going deeper and deeper, and community sources note the level counter can technically go up to 2,147,483,647.

Quick Scoop

  • There is no intended bottom to the Skull Cavern.
  • The game’s level number is limited by its integer cap, which is 2,147,483,647.
  • Reaching anywhere near that is not realistically possible in normal play.

What Players Usually Mean

Most players are really asking how far they can go before the run ends, and the answer is: until you run out of time, health, or resources. The cavern always restarts from floor 1 each visit, unlike the regular Mines. Mr. Qi’s reward for reaching level 25 is a milestone, but not the end.

TL;DR

Skull Cavern has no real max floor in normal gameplay, but the internal floor counter can theoretically reach 2,147,483,647.