Winterkill by Craig Lesley

Danny Kachiah is a Native American fighting not to become a casualty. His father, Red Shirt, is dead, his wife Loxie has left him, and his career as a rodeo cowboy is flagging. But when Loxie dies in a car wreck, leaving him with his son, Jack, whom he hardly knows, Danny uses the magnificent stories of Red Shirt to guide him toward true fatherhood.