Like Rebel said, if you're really going hiking you hit the trails in a national park. I don't want to give these guys the benefit of the doubt and say yes, they really are that stupid and really were just hikers. These guys are CIA or some other alphabet agency.
Of course there is that chance these really are genuine idiots like what's-her-name bleeding heart princess that threw herself in front of a bulldozer in Gaza, in which case I'm all for Iran keeping them.