Forest is an Adventure Field in Sonic the Hedgehog (2006) and is one of the three hub worlds presented in the game. From here, players can access Action Stages, obtain Town Missions and collect Medals. It is an open part of wilderness outside the urbanized areas of Soleanna.
It is the first field that Silver reaches following his run of Crisis City and where he and Sonic go through the three trials of Soleanna to reach Kingdom Valley. It is also where Shadow goes to get his version of said stage. Sonic and Silver also go through the forest to reach Tropical Jungle, which Sonic does alongside Princess Elise.
- It is the last Adventure field that Sonic is able to enter, as he must complete his entire Episode before he is allowed to enter the area.
- Of all the Adventure Fields in the Game, it is the largest and as such one of the most emptiest in the entire game.
- If one causes a glitch to get Sonic into the area early, an area could be found in the center containing the 2-Demionsional objects that are used during the Race with Sonic Man and other Highway side-missions. There is nothing else one can do here, as the doors do not show up nor do level entrances if one does this glitch.
- Of all characters to enter it, Shadow is the only one to not go through the Trials of Soleanna in order to reach his version of Kingdom Valley.