The 10 Most Dangerous Hikes in the U.S.

To many a visit to the great outdoors means a leisurely stroll through the well-worn trails of a nearby state park, perhaps entailing the odd clamber over a felled tree or rogue boulder before taking a well-deserved granola bar break. And then there are these: Extreme adventures that offer intense and thrilling challenges to even the most seasoned outdoorsman, from terrain, or temperature, fauna or any combination of the three.