The Judith River is a tributary of the Missouri River, approximately 124 mi (200 km) long, running through central Montana in the United States. It rises in the Little Belt Mountains and flows northeast past Utica and Hobson. It is joined by Dry Wolf Creek in northern Fergus County, and itself joins the Missouri in the approximately 18 mi (29 km) northwest of Winifred. The Judith is a Class I river from the confluence with Big Spring Creek to its confluence with the Missouri River for public access for recreational purposes.