Ernest Oberholtzer was an early 20th century environmental advocate and explorer known for his efforts to protect the Quetico-Superior region on the Minnesota-Ontario border. In the early 1900s, he canoed over 3,000 miles in the region and nearly froze to death on a 2,000 mile canoe trip along Hudson Bay in 1912. Later in life, Oberholtzer fought successfully to establish the region as one of the first officially recognized wilderness areas through the Shipstead Nolan Act of 1930. He lived simply for 50 years on an island in the region, advocating for preservation and establishing a nature retreat center.