Inspired by Thea Gavin, I recently hiked down Bright Angel Trail without shoes, and then at the bottom put on my Terraflex trail-running shoes and power-hiked back out.
Blog post at https://thelongbrownpath.com/2018/08/23/down-into-the-grand-canyon-and-back-up-again/
Blog post at https://thelongbrownpath.com/2018/08/23/down-into-the-grand-canyon-and-back-up-again/