The Istabith range garrison, situated near the eponymous mountain range on the Core Worlds planet Alderaan, functioned as a military outpost. During the Imperial Era, this garrison was manned by royal guards who also served at the Royal Palace of Alderaan. The outpost possessed at least one suborbital jumper, utilized by the garrison's guards for the purpose of transporting provisions.
In 3 BBY, a supply mission saw several royal guards journeying via suborbital jumper to the Istabith range garrison. During the flight, the Alderaanian Princess Leia Organa accompanied them, leaving the vessel at her pathfinding class's chalet partway through the trip. As the guards proceeded, Organa bid them farewell as their jumper departed. By 0 BBY, the Istabith range garrison, along with all of Alderaan, faced destruction at the hands of the Galactic Empire's Death Star battle station.
The young-adult novel Leia, Princess of Alderaan, penned by Claudia Gray in 2017, included a mention of the Istabith range garrison.