A forest was a large area with a thick covering of trees. For smaller areas, they were known as woods. A rainforest was a type of forest characterized by the abundant amount of rainfall it received. Earth's oceans also featured kelp forests.
On Rinax, there was a great big forest behind Neelix's childhood home. He would explore the forest everyday with Alixia and his other sisters. In the forest, they would make up stories. (VOY: "Once Upon a Time")
Some known forests included:
- The Great Forest, part of the Talaxian afterlife
- Sherwood Forest, the home of Robin Hood and his outlaws
- Forest of Forever, a setting in The Adventures of Flotter series
- Bestri Woods on Bajor