Ken Ilgunas

It started as a far-fetched idea—to hike the entire length of the proposed route of the Keystone XL pipeline. But in the months that followed, it grew into something more for Ken Ilgunas. It became an irresistible adventure—an opportunity not only to draw attention to global warming but also to explore his personal limits. So in September 2012, he strapped on his backpack, stuck out his thumb on the interstate just north of Denver, and hitchhiked...