Felwood, aka Felwood Forest, is a contested zone located in Kalimdor, north of Ashenvale, east of Darkshore, and west of Hyjal and Winterspring. It is a corrupted forest filled with tainted creatures of the woods, demonic satyr and infernals, rotting treants and ancients, as well as the tauren and night elves who try to battle back the sickening of the land. It is also home to one of the two tribes of pure furbolgs left in the world the Timbermaw.

This lush and vibrant land of woods and meadows was tended by the kaldorei and protected by Cenarius. Bubbling streams ran through quiet, grassy meadows, and the summer sun was tempered by the whispering breeze and the cooling rain. The leafy corridors of the forest rang out with the music of songbirds. It was as close to a paradise as the world has ever known. Then the Burning Legion befouled the land using The Skull of Gul'dan. Any trees and creatures that escaped the outright destruction became forever cursed in the demons' rampage. Having felt the cursed touch of the Burning Legion, Felwood is an eerie, dark, and haunted region of scattered gloomy woodlands and tainted vales, all of it teeming with evil. The meadows of Felwood retain the sickly, charred look they took on when the demons cursed the land during the third war. Nothing grows there. The mighty ancients that once guarded the land now roam blindly, their limbs twisted and their bark hides bleeding fel poisons. The once tranquil rivers and streams now boil with poison and noxious gases.

Felwood is a dismal and dangerous land to all who enter. Most cross into Felwood only out of necessity, for it lies directly along the road to Hyjal Summit. Armed travelers are usually safe if they pass along the main road by day, but they have no guarantee of safety if they leave the trail or if they venture into Felwood after nightfall. The night elves feel constant shame that they failed to protect this noble land. All their efforts to restore health to the woods and meadows through divine magic have failed. Despite the lingering curse of The Skull of Gul'Dan, the night elves refuse to cease their efforts to lift it. Some think that the key to healing the blighted land lies with Illidan, brother to the night elf hero Malfurion Stormrage. Illidan was known to have consumed the Skull of Gul'dan, which also blighted the forest. Only powerful divine magic can likely save the land, however.