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Heading out the door? Read this article on the new Outside+ app available now on iOS devices for members! Download the app.

In August 2018, climbers Yuji Hirayama, James Pearson, Toru Nakajma, Matty Hong, and Caroline Ciavaldini travelled into the spectacular Japanese wilderness to dive into the realm of Sawanobori—the art of scaling mountain streams to their sources, despite the flowing water pushing climbers in the opposite direction.

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