William Clark came across a stream which he considered particularly clear and pretty, and named it the Judith River, in honor of his cousin Julia Hancock.

It is also known for its large amount of Cretaceous dinosaur fossils, including those of Tyrannosaurus, Styracosaurus and Edmontosaurus.

William Clark renamed it in honor of his future wife, Julia (Judith) Hancock.

and Erwin Davis, Samuel T. Hauser, and Granville Stuart; and the PN Ranch of Thomas C. Power and G.R.

[4] White Eagle, "the last major Chief of the Gros Ventre people", died "at the mouth of the Judith River" on February 9, 1881.