Hill Top Zone is a location that appears in the Sonic the Hedgehog film series produced by Paramount Pictures and its spin-offs. It is an mountainous alien area in the Earth's universe that Tails visited while searching for Sonic.
The Hill Top Zone is a mountainous area above a white cloud cover. It possesses a blue sky and orange mountain peaks piercing the cloud covers, although there are also blue cliffs with green grass cover on them in this region as well. Other flora found in this regions are evergreen pine trees with green crowns and brown trunks, and red flowers. Architecture found in Hill Top Zone include broken down gondolas made of blue wood and green vines that allow one to travel between the individual peaks.
Sonic the Hedgehog 2: The Official Movie Pre-Quill
During his search for Sonic, Tails went to Hill Top Zone. Upon arriving there through a Ring however, he discovered he had hit another dead end, as Sonic was nowhere to be found. Consulting his Miles Electric, Tails discovered two strong chaos energy signatures within reach: one on the Mushroom Planet and one on Earth. Detecting that some pursuers were incoming as well, Tails left Hill Top Zone through another Ring to investigate his leads. Immediately after Tails' departure, some aliens scavengers working for Knuckles visited Hill Top Zone, where they surveyed the area for Sonic.