The Grendin River was a river on the planet Lok. Nym's Stronghold was built next to the river, a bridge connected it with the starport on the other side. Some legs of the Lok Marathon swoop racing track followed the bed of this river.
The Grendin River first appeared in the 2003 video game Star Wars Galaxies, a massively multiplayer online roleplaying game developed by Sony Online Entertainment and published by LucasArts, prior to its closure on December 15, 2011. Its name was revealed during the Lok Marathon swoop race.