The Crooked Moon campaign is usually a long D&D campaign rather than a one-shot, since it’s written as a full adventure path that starts at level 3 and ends at level 14, with some groups potentially stretching it toward level 20.

What that means in play

At the table, the actual length depends on your group’s pacing, how much side content you explore, and how often you play. A group that sticks closely to the main plot will finish much faster than one that leans into roleplay, travel, and optional encounters. The module’s main adventure is structured as a substantial, multi-chapter campaign, not a short arc.

Practical estimate

A reasonable expectation is:

  • Fast group: around 20–30 sessions.
  • Typical group: around 30–50 sessions.
  • Slow or very exploratory group: 50+ sessions.

That estimate is a play-based approximation rather than an official published session count, because different tables move at very different speeds. The available descriptions emphasize that it is a large campaign with a lot of content, including player options, monsters, and a main adventure spanning many levels.

TL;DR

If you’re asking “how long is Crooked Moon?”, the safest answer is: several months to more than a year of regular play , depending on session length and how thoroughly your table runs it.