You'd be surprised how a pokemon go player will open the app in the middle of the wilderness, even with one questionable reception bar, just to see if there's a secret rare pokemon that lives there. Bonus if you get a postcard from a pokestop someone submitted, because that trail mile marker is "special." You can keep it for memories, or send it to a friend you've never spoken to, for bragging rights. It's also not unheard of, for people to crawl through backroads in their car, since the app won't let catch pokemon or count km's, if you go more than +-15 mph.