70 is generally not the age we associate with long-distance hiking.
But Southern Oregon's Dami Roelse works to push the boundaries, both for herself and people her age. She's been known to set out on the Pacific Crest Trail for two weeks at a time, even in frigid conditions.
Dami tells her stories in the book Walking Gone Wild: How to Lose Your Age on the Trail. She drops by the studio just before--no joke--setting out on a hike in the Sierra.