In September 2012, Ken Ilgunas stuck out his thumb in Denver, Colorado, and hitchhiked 1,500 miles north to the Alberta tar sands. After being duly appalled, he commenced to walk nearly 2,000 miles, (mostly) following the route of the proposed Keystone XL pipeline, from Alberta to the Texas Gulf Coast.
It would become a 4.5 month journey across the Great Plains. To follow the pipe, he couldn't take roads. Instead, he walked across fields, grasslands, and private property. He had to trespass across America.