The Emerald Hill Zone is a location that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It was a verdant Zone found on Mobius during Operation: Clean Sweep.
The Emerald Hill Zone is a region consisting mostly of trees, rectangular shaped rocks, grass, and water.
During Operation: Clean Sweep, Sonic and the Knothole Freedom Fighters arrived in the Emerald Hill Zone after defeating Dr. Eggman in Final Zone. They met up with Sonic's friend, Tails, and Sonic introduced him to the Freedom Fighters. It is here where Tails was working on Sonic's plane, the Tornado. The worst earthquake tremor yet hit while the group was here, and they decided to head to Eggman's next factory, the Chemical Plant Zone.
- Note: From this point, the Emerald Hill Zone's history continues from its new existence in the altered timeline.