The inhabitants of Kintan referred to the lava streams within the Endless Wastes as Rivers of Fire. Similar to other lava formations, the Rivers of Fire had temperatures in the approximate range of 1300°F to 2200°F, which also caused the surrounding air to heat up. The soil surrounding the river was dark, hardened, and composed of rock and glass.
During 30 BBY, the Jedi Quinlan Vos and Aayla Secura, pursued by Bok, traversed one of the Rivers of Fire on Kintan.