The forest is a location in Adventure High, to the east of the lake.
With the exception of meeting Reese on the Mysterious Revenge route, and starting Julia's Arsenal route, along with meeting Kate here if you're planning on dating her, there's very little reason to visit this area.
Trivia
- If you date Sarah, she mentions having a dislike of the forest and only wants an aerial view of it for strategy purposes. Whether she means this location or another one is unknown, however.