On June 10, 1916, Ernest Hemingway departed Chicago for one of his many trips to Northern Michigan, but this one was dedicated to fishing. Many credit Hemingway’s love of fly-fishing in Northern Michigan for the Nick Adams short stories.
Source : Michigan Every Day.
The Nick Adams stories. New York, Scribner 
Ernest Hemingway [videorecording] : life in Michigan / WCMU ; Michigan Humanities Council. [Mount Pleasant, Mich.] : WCMU, . [The film] “takes a closer look at ‘Ernie,’ a boy from Oak Park, Illinois, spending his boyhood summers with his family at their cottage in Northern Michigan. Years later, Hemingway would incorporate his memories from the area into a collection of fictional stories about a boy named ‘Nick Adams’ who loved hunting, fishing, and friends in places like Petoskey and Horton Bay”
Photo: Young Ernest Hemingway fishing at Walloon Lake, Michigan, 1916 (Image from the Ernest Hemingway Collection, John F. Kennedy Presidential Library. Found on Wikimedia Commons)