An abundance of fishing opportunities await the avid angler in and around Lewistown. From world-class flyfishing for rainbow and brown trout to river and lake fishing for walleye, pike, catfish and small-mouth bass, your supply is almost limitless in fishing access points.
River fishing in abundance can be found on both the Missouri and Judith Rivers. A mulititude of ponds and small lakes dot the landscape, with nine state fish and game public access sites within ten miles of town.
Big Spring Creek originates seven miles southeast of Lewistown where it bubbles out of the ground near the state trout hatchery and runs almost twenty-six miles to where it joins the Judith River. It is a stream of extraordinary beauty and is a superb fishery.