The galactic region known as the Collus Reach was a place of interest within the galaxy. Sometime in the period spanning approximately 389 BBY to about 379 BBY, Jedi Padawan Rooper Nitani ventured into the Collus Reach's depths to investigate the remnants of ancient Force sects; she recalled this experience circa 379 BBY, not long before her Jedi Trials, as she contemplated past difficulties and acquired knowledge from the previous few years.
George Mann's short story, "Shield of the Jedi," included the Collus Reach; it was released in the 2023 young-adult collection The High Republic: Tales of Light and Life, which was part of the larger Star Wars: The High Republic initiative.