The forest theme is a stage theme in the Sonic the Hedgehog series. Stages with this them have a forestial setting. These stages usually have an emphasis on platforming and elevated exploration. This is one of the most common themes in the Sonic the Hedgehog series. This kind of setting includes settings with many trees and/or jungle elements. This theme is closely related to the Green Hill theme.

Stages

• Jungle Zone, Sonic the Hedgehog (8-bit) (1991) - This is the first example of a stage with a forest theme and incorporates many elements used in later stages, such as large, bottomless pits and platforming.

• Wood Zone, Sonic the Hedgehog 2 (16-bit) (1992) - This was a deleted Zone from Sonic 2.

• Collision Chaos, Sonic the Hedgehog CD (1993) - This forest theme's elements predominate the past timeline of this round.

• Angel Island Zone, Sonic the Hedgehog 3 (1994) - This Zone also incorporates elements of the underwater and fire theme from halfway through Act 1 and onwards.

• Mushroom Hill Zone, Sonic & Knuckles (1994)

• Meta Junglira Zone, Sonic the Hedgehog Triple Trouble (1994)

• Isolated Island, Knuckles' Chaotix (1995) - This stage also incorporates elements of the Green Hill theme.
• Botanic Base, Knuckles' Chaotix (1995)
• Rail Canyon, Tails' Skypatrol (1995) - This area also incorporates elements of the railway and canyon themes.

• Poloy Forest, Tails Adventure (1995) - This stage also incorporates elements of a fire theme.
• Green Island, Tails Adventure (1995)
• Caron Forest, Tails Adventure (1995)
• Lake Crystal, Tails Adventure (1995)

• Mushroom Hill, Sonic the Fighters (1996)

• White Jungle, Sonic Adventure 2 (2001)
• Green Forest, Sonic Adventure 2 (2001)

• Neo Green Hill Zone, Sonic Advance (2001) - Mainly predominates in Act 2; Also incorporates elements of the Green Hill theme.

• Frog Forest, Sonic Heroes (2003) - This stage also incorporates elements of the Green Hill and sky themes.
• Lost Jungle, Sonic Heroes (2003) - This stage also incorporates elements of the coastal theme.

• Angel Island, Sonic X (2005)

• Iron Jungle, Shadow the Hedgehog (2005) - This stage also incorporates elements of the industrial theme.

• Jungle Zone, Sonic Jump (2005)

• Leaf Storm, Sonic Rush (2005)

• Green Cave and White Cave, Sonic Riders (2006)

• Tropical Jungle, Sonic the Hedgehog (2006) - This stage also incorporates elements of the ancient ruins theme.

• Forest Falls Zone, Sonic Rivals (2006) - This stage also incorporates elements of the Green Hill theme.

• Dinosaur Jungle, Sonic and the Secret Rings (2007) - This stage also incorporates elements of the coastal theme.

• Plant Kingdom, Sonic Rush Adventure (2007) - This stage also incorporates elements of a coastal theme (Act 1 only) and an underwater theme.

• Sunset Forest Zone, Sonic Rivals 2 (2007) - This stage also incorporates elements of the Green Hill theme.

• Botanical Kingdom, Sonic Riders: Zero Gravity (2008)
• Snowy Kingdom, Sonic Riders: Zero Gravity (2008) - This race course also includes elements of the winter theme.

• Mystic Ruins, Sonic Chronicles: The Dark Brotherhood (2008) - This area also incorporates elements of the ancient ruins theme.

• Jungle Joyride, Sonic Unleashed (2008) - This stage has many jungle elements, making it a great example of a forest-themed stage. It also incorporates elements of the ancient ruins and coastal themes.

• Deep Woods, Sonic and the Black Knight (2009)
• Shrouded Forest, Sonic and the Black Knight (2009)

• Treetops, Sonic & Sega All-Stars Racing (2010)

• Planet Wisp, Sonic Colors (2010) - This stage mainly incorporates elements of the industrial and canyon themes.

• Green Hill, Sonic Generations (2011) - This stage mainly incorporates elements of the Green Hill theme.
• Planet Wisp, Sonic Generations (2011) - This stage mainly incorporates elements of the industrial and canyon themes.
• Mushroom Hill, Sonic Generations 3DS (2011)

• Dream Valley, Sonic & All-Stars Racing Transformed (2012) - This track also includes elements of the canyon and haunted themes.

• Jungle Zone, Sonic Jump (2012)

• Mushroom Hill Zone, Sonic Dash (2013)

• Silent Forest, Sonic Lost World (2013) - Mainly predominates in Zones 1, 2 and 4; Zone 4 also incorporates elements of the haunted theme.

• Lyric's Tomb, Sonic Boom: Rise of Lyric (2014) - This stage also incorporates elements of the ancient ruins theme.
• River Rush, Sonic Boom: Rise of Lyric (2014) - This stage also incorporates elements of the ancient ruins theme.
• The Pit, Sonic Boom: Rise of Lyric (2014) - This stage also incorporates elements of the industrial theme.

• Seaside Jungle, Sonic Boom: Shattered Crystal (2014)

• Jungle, Sonic Dash 2: Sonic Boom (2015)
• Mountain, Sonic Dash 2: Sonic Boom (2015)

• Kodiak Frontier, Sonic Boom: Fire & Ice (2016) - This stage also incorporates elements of the winter theme.
• Seaside Island, Sonic Boom: Fire & Ice (2016) - This stage also incorporates elements of the ancient ruins and coastal themes.
• Paleo Tarpits, Sonic Boom: Fire & Ice (2016) - This stage also incorporates elements of the underground theme.
• Cutthroat Cove, Sonic Boom: Fire & Ice (2016) - This stage also incorporates elements of the coastal theme.
• Gothic Gardens, Sonic Boom: Fire & Ice (2016) - This stage also incorporates elements of the ancient ruins theme.

• Press Garden Zone, Sonic Mania (2017) - Act 2 only. This stage mainly incorporates elements of the East Asian theme.
• Stardust Speedway Zone, Sonic Mania (2017) - Act 1 only. This stage mainly incorporates elements of the urban theme.

• Mystic Jungle, Sonic Forces/Speed Battle (2017) - These stages also incorporate elements of the ancient ruins and amusement themes.
  • Luminous Forest
  • Casino Forest
  • Aqua Road
  • Eggman's Facility
  • Fire Cannon 1
  • Vanish Panel 2
  • Dash Vegas
  • Glowing Grotto
  • Electric Arbor
  • Lambent Grove
  • Tangled Tunnels

• Mining Mayhem, Sonic Forces: Speed Battle (2017) - This tracks also incorporate elements of the industrial and canyon themes.
  • Mining Mayhem R

• Angel Island Zone, Sonic Mania Plus (2018)

• Wisp Circuit, Team Sonic Racing (2019) - This track also incorporates elements of the industrial and canyon themes.
• Mother's Canyon, Team Sonic Racing (2019) - This track also incorporates elements of the industrial and canyon themes.
• Doctor's Mine, Team Sonic Racing (2019) - This track also incorporates elements of the industrial and canyon themes.

• Kronos Island, Sonic Frontiers (2022) - This Open-Zone area also incorporates elements of the ancient ruins and coastal themes.
• Rhea Island, Sonic Frontiers (2022) - This Open-Zone area also incorporates elements of the ancient ruins and coastal themes.
• Ouranos Island, Sonic Frontiers (2022) - This Open-Zone area also incorporates elements of the ancient ruins and coastal themes.

• Speed Jungle Zone, Sonic Superstars (2023) - This Zone also incorporates elements of the ancient ruins and industrial themes.

• Nightmare Maze, Sonic Dream Team (2023) - This stage also incorporates elements of the haunted theme.

• Rainbow Garden, Sonic Racing: CrossWorlds (2025) - This track also incorporates elements of the canyon theme.
• Mystic Jungle, Sonic Racing: CrossWorlds (2025) - This track also incorporates elements of the ancient ruins and amusement themes.
• Minecraft World, Sonic Racing: CrossWorlds (2025) - This track also incorporates elements of the ancient ruins, coastal, fire, space and underground themes.
• Dinosaur Jungle, Sonic Racing: CrossWorlds (2025)

Bosses

Hub worlds