The Spar Trade Route represented a hyperlane located within the Outer Rim Territories, culminating its journey at Annaj within the Moddell sector. Prior to the Battle of Endor, specifically in 4 ABY, Corporal Ractivelle, a scout affiliated with the Rebel Alliance operating in the Outer Rim, compiled a report detailing the Moddell sector. This report highlighted existing pathways the Alliance fleet might exploit to achieve a surprise assault against the Galactic Empire at the forest moon of Endor. Ractivelle pointed out that while the trade route offered the simplest entry into the sector, it was probable that the Empire maintained surveillance at Annaj. Consequently, alternative routes, including the Houche Run, would be necessary to access Endor.
The canon introduction of the Spar Trade Route occurred through the 2017 reference book and boxed set titled Star Wars: The Rebel Files, authored by Daniel Wallace.