Hike the Grand Canyon Rim-to-Rim!
Don't try this at home: Our editor-in-chief tackles a gonzo 21-hour rim-to- rim-to-rim hike in the Grand Canyon with friend Shelli Johnson.
Heading out the door? Read this article on the new Outside+ app available now on iOS devices for members! Download the app.
VIDEO: Grand Canyon Rim-to-Rim-to-Rim!