When Yvon Chouinard started making climbing pitons in a chicken coop behind his parent's house, he had no interest in creating one of the world's most iconic outdoor brands. He and his fellow climbers just wanted higher quality tools that left a smaller environmental footprint.

But the 83-year-old did more than create a $1 billion brand known around the world from professional climbers to runway models. He created a company that has become synonymous with fighting climate change and supporting environmental issues.

In our season 3 finale, the story of Patagonia that's as wild and beautiful as the landscape that inspired its name.