North from the Continent of Equatara, there lies one of the most dangerous wild ecosystems in the world. That land is Hell Creek, named for it's humid environment, and wild and dangerous megafauna. Hell Creek first formed 70 million years ago, 60 million years ago as the environment changed, Hell Creek all but disappeared. However as the world kept changing, Hell Creek eventually returned, though with some changes to it's ecosystem.
The climate is sub-tropical and mild. While the temperature might drop during winter, it wouldn't be so low to freeze or snow; and wouldn't last for a long time.
Forests flourish in the lowland and coastal plains which composed most of the area, not to different from the Okavango Delta or Florida Everglades in our world. There are both deciduous and evergreen plants here. The dominant plants would be angiosperms in the form of trees (magnolias, figs, pawpaws, jackfruit/breadfruit-relative, walnuts, poplars, oaks, tulip trees, palms, broadleafs, cypress, etc