The Gravity Falls forest is a large area that surrounds most of Gravity Falls, Oregon. It is home to a variety of mystical creatures, including gnomes. It was the hiding place of Journal 3, until the book was discovered by Dipper Pines. Dipper stated that he felt like he was being watched in the forest. Gnomes reside in one part of the forest.
In "Tourist Trapped," Stan Pines told the employees of the Mystery Shack to go and put up signs in the forest to advertise the Shack. After a brief discussion, Dipper was elected as the one to put them up, and begrudgingly ventured into the forest to do so. In the forest, while Dipper was nailing up the signs, he discovered that one of the trees made a metallic ringing sound as the nail was hammered in. He then discovered a secret panel in the fake tree, which uncovered a strange box with two switches on it, one of which revealed the hiding place of the book Journal 3.
Later on, the Gnomes, who were disguising themselves as a teenage boy named Norman, brought Mabel Pines there to attempt to force her to marry them and become their gnome queen. Dipper used the Mystery Cart to save Mabel, and they fled the forest to fight the gnomes at the Mystery Shack.
Part of the forest contains Height-altering crystals, as shown in "Little Dipper." These crystals have caused legends of tiny buffalo and giant squirrels, and has created miniature deer, gigantic butterflies, and giant caterpillars. Dipper takes one of the crystals and uses it to make the crystal flashlight.
The Gravity Falls forest is the setting for a level in the game "Fright Night."
In "Boss Mabel," Dipper captures a Gremloblin out in the forest to bring into the exhibit of the Mystery Shack, to show something that wasn't one of Stan's hoaxes. Ironically, everybody else thought it wasn't real.
In "Into the Bunker," Wendy finds a branch lever leading to the bunker, and at the end of the episode, Dipper admits his feelings to a Shape Shifter who pretended to be a drowned Wendy. The actual Wendy overhears.
- 101. "Tourist Trapped"
- 106. "Dipper vs. Manliness"
- 109. "The Time Traveler's Pig"
- 111. "Little Dipper"
- 113. "Boss Mabel"
- 114. "Bottomless Pit!"
- 118. "Land Before Swine"
- 119. "Dreamscaperers"
- 120. "Gideon Rises"
- 202. "Into the Bunker"
- Postcard Creator
- Fright Night
- Rumble's Revenge
- Mystery Shack Attack
- Li'l Gideon Shrinks Back
- Villains Unite!
- In Rumble's Revenge, the forest appears to contain "acorn-spitting stumps."
- In "Into the Bunker", it is discovered that the author hid in a secret bunker below a tree.