B'trilla, a planet shrouded in mist, existed in the B'trilla system and can be found in the Back Reach region. This world was positioned within the Gordian Reach sector, specifically in the Trans-Hydian segment of the Outer Rim Territories. The Ardan Cross hyperlane provided a route linking it with the Chenowei and Feena systems. As the homeworld of the sentient B'trillan species, B'trilla had a significant population.
The reference book The Essential Atlas, released in 2009 and written by Daniel Wallace and [Jason Fry], presented B'trilla, locating it at coordinates Q-5.