Thunderhead Pass

Thunderhead Pass is a location on Cybertron.

IDW Generation 1 continuity
After Thunderwing underwent the polydermal grafting process, he went on a rampage, forcing Optimus Prime and Megatron to work together to destroy him. However, Thunderwing was ultimately swallowed up by the planet, at what became known as Thunderhead Pass. The Transformers were forced to abandon Cybertron in the process.

Seven hundred stellar cycles later, Jetfire and the Technobots discovered Energon readings near the location of Thunderhead Pass. Jetfire decided that they should investigate, but were attacked by a group of Decepticons under the leadership of Bludgeon who worshipped Thunderwing as the herald of a new Cybertron. They reactivated Thunderwing and sent him to Nebulos, but the Axis Cradle controlling him was destroyed by Springer, causing Thunderwing to return near Thunderhead Pass. He was defeated by draining his Ultra-Energon reserves due to the Wreckers, the Predacons, Centurion droids, and a speech/salvo from Optimus Prime.

After Thunderwing's second defeat, a detachment of Autobots under Hound were set to guard Thunderhead Pass while a small team of scientists under Jetfire conducted research. Once the research was concluded, Jetfire and his team left, but the guards remained as Thunderwing's body was secured there. That turned out to be for naught when Galvatron attacked the guard post in order to recover Thunderwing's remains. He killed Leadfoot, incapacitated the others, and ultimately escaped with his prize.

Some time thereafter, Rotorstorm singlehandedly repelled an aerial assault on Thunderhead Pass. This remarkable feat earned him a place among the Wrecker Reservists.

Prime cartoon
There was a battle at Thunderhead Pass, after which Bulkhead transferred from the Wreckers to Team Prime.

Foreign names

 * Mandarin: Léi Yún Guān (China, 雷云关, "Thunder cloud pass" )