Trash Coast is located south-east of The Rust Commons East. It is a barren area full of trash on the coast, hence 'Trash Coast'. It is overrun by spiderants and is home to the Rakk Hive. A part of the Vault key is also acquired here.
According to Patricia Tannis, bandits control the entrance to this area. Bandits have survived here by placing a Spiderant Queen body part in their camp to ward off spiderants.