The Elphrona Outpost, a Jedi base, existed in the High Republic Era. It was situated on the Outer Rim Territories world of Elphrona, not far from the Unknown Regions. The Jedi Order utilized this base as a repository for valuable items and historical relics.
The Elphrona Outpost held valuable items, including a collection of Jedi holocrons and a lightsaber rifle.
During the High Republic Era, specifically in 382 BBY, Jedi Master Rinn served as the marshal in charge of the Elphrona Outpost. Later, during 232 BBY of the same era, Jedi Masters Porter Engle, Loden Greatstorm, Greatstorm's Padawan Bell Zettifar, and Indeera Stokes were stationed at the base to maintain order. In 19 ABY, Luke Skywalker, a Jedi Master, accompanied by his Padawan Ben Solo and the explorer Lor San Tekka, paid a visit to the outpost as Skywalker worked to re-establish the Jedi Order. The group encountered Ren and the Knights of Ren, who were also seeking to acquire the artifacts housed within the outpost.