Norman is a 35-year-old man working for the United States Forest Service. Taking after his father, he embraces the spiritual practice of fly fishing as a way to connect with nature and his loved ones. He feels a deep responsibility toward his family and constantly attempts to support his younger brother through his destructive habits.

Paul is a 32-year-old newspaper reporter living in Helena. Charismatic and fiercely independent, he is a masterful fly fisherman who finds true peace only on the river. In human society, he drinks heavily, participates in high-stakes gambling, and often solves conflicts with his fists.

A retired Scottish-Canadian Presbyterian minister living in Missoula. He teaches his sons to love the beauty of the natural world, viewing fly fishing as a meditative and spiritual discipline. He guides his family with love rather than strict religious imposition.

The gentle matriarch of the Maclean family. She cares for her husband and sons in a traditional manner, preparing meals for their river excursions and maintaining their home. She harbors a special, protective affection for her youngest son, Paul.

Norman's wife, a woman of Scottish heritage who shares her husband's quiet strength. She carries the emotional burden of caring for her alcoholic brother, Neal. She is devoted to Norman, though her family's demands occasionally create strain in their marriage.

Jessie's brother, who arrives in Montana on vacation. He suffers from severe alcoholism and becomes the focus of his family's intervention attempts. He resists the calming influence of fly fishing, preferring to drink and tell tall tales of his supposed hunting prowess.

An ex-rodeo trick rider and local prostitute who frequents the summertime bars. She befriends Neal during a drinking binge and joins a family fishing trip, where she brings chaos to the Macleans' sacred fishing grounds.

Jessie and Neal’s mother. She lives in Wolf Creek and is highly protective of Neal, hoping that spending time outdoors with Norman and Paul will cure him of his destructive habits.

Jessie and Neal's brother. He participates in the extended family gatherings in Wolf Creek and helps facilitate their riverside outings.

Kenny's wife, often called Dottie by the family. She is an understanding presence in Jessie's household and offers reassurance during stressful family conflicts regarding Neal.

A Native American sheepherder and sharpshooter who frequents the local bar. He listens to Neal's exaggerated hunting stories over drinks.