Long before the Republic initially settled Koboh, earlier groups constructed stone and mud structures directly into the cliff sides. This bygone settlement was eventually abandoned, and their structures were considered the oldest on the planet. By 9 BBY, a group of Jawas had settled in the same area and built a digger crawler.
Rambler's Reach Valley was named by the first priorite prospectors on Koboh, who found the area to be the best spot to put down roots. It was a dry and craggy place home to a variety of flora and fauna in spite of the challenging environment. During the High Republic Era, scientists from the Jedi Order and Galactic Republic collaborated to research the Koboh Abyss and the anomalous Koboh matter. They had several installations within and near the valley. Within Rambler's Reach Valley, the Jedi constructed two meditation chambers, and the Republic and Jedi together built the Alignment Control Center as well as monitoring stations within the Phon'Qi caverns, among others. After an Emergence struck Koboh's moon, the resulting debris caused massive damage to Koboh's surface. The destruction accelerated the evacuation of Jedi and Republic officials, who subsequently abandoned the planet.
Eventually, Rambler's Reach Valley found new life when prospectors searching for priorite settled. By 9 BBY, the town of Rambler's Reach Outpost had been well established. The unofficial mayor of the town, Doma Dendra, ran Dendra's Antiquities within the town, and a cantina eventually called Pyloon's Saloon that was constructed nearby. Below the saloon lay a network of smuggler's tunnels, which provided access to a sizable landing pad. Although many prospectors lived within the valley, other residents sought a pastoral lifestyle, such as herding nekko.
Early prospectors based in Rambler's Reach Valley built complex systems to provide the area with fresh water. At some point, however, dams were constructed in the nearby Dredger Gorge to redirect the flow of Koboh tar such that priorite deposits could be found. However, this had an unintended side effect of backing up the tar into Rambler's Reach Valley. The tar eventually found its way into and through the valley's water treatment system, contaminating the water supply. Dendra assessed the damage, concluding that repair was unfeasible. From that point, the locals got their water from the river flowing through the valley.
In 9 BBY, Cal Kestis crash landed on Koboh and traveled by foot to Rambler's Reach Valley where he reunited with his friend Greez Dritus, who had become the owner of the town's cantina, which he renamed after his great-grandmother. Kestis frequently visited the cantina as he investigated the Jedi history of Tanalorr, a legendary planet rumored to lay beyond the Koboh Abyss. In doing so, Kestis came into conflict with the Bedlam Raiders, a local marauder group led by the Gen'Dai warrior Rayvis and his master, a fallen Jedi named Dagan Gera. The Bedlam Raiders indiscriminately persecuted the local populace of Rambler's Reach Valley with their reprogrammed battle droids and well-trained warriors.
Kestis's actions soon brought increased Imperial presence to Rambler's Reach Valley, as well as bounty hunters from the Haxion Brood.
Rambler's Reach Outpost was first revealed in the teaser trailer for the 2023 video game Star Wars Jedi: Survivor, and the area served as a main setting for the game.
- The Art of Star Wars Jedi: Survivor