What is the longest US hallway that is meant for people to walk in?

The longest hallway in North America is in downtown Los Angeles.

http://www.mtv.com/news/articles/1433123/19970717/penn_michael.jhtml

I was thinking the Pentagon, and googling "longest hallway pentagon" brought up at the very top of the list the same question posted by star-gazer a year ago.

http://www.funtrivia.com/askft/Question93481.html

The hallway referenced in Tigergold's link would most likely not be an indoor hallway, but some time of corridor between buildings. Just my guess.

I'm sticking with the Pentagon.

"It has five sides, five floors above ground (plus two basement levels), and five ring corridors per floor with a total of 17.5 miles (28.2 km) of corridors."

https://en.wikipedia.org/wiki/The_Pentagon

This is also worth a mention:

Of course some survive: St. Charles Seminary, in Overbrook, Pennsylvania, stands today in marbled admiration of itself, still readying young men for the archdiocese of Philadelphia. Once St. Charles was claimed to have the longest main corridor of any building in America. It is quite a corridor, polished and draped with heavy oils of bishops and former rectors. The seminary dates from a period when American prelates were putting up churches and schools as if Catholicism were a monopoly board. Edifice complex.

[ aliciapatterson.org/APF0305/Hendrickson/Hendrickson.html no longer exists ]
http://aliciapatterson.org/stories/lord-talking

Yes, it would have...and into what would he have morphed Dick Cheney?

This story says Cheney, as well as Eisenhower and Marshall, got lost in there.

"With time, the joke evolved to include a freckled-faced Western Union messenger boy who went into the Pentagon to deliver a telegram on Monday and walked out Friday a full colonel; others insisted he only came out a major."

http://www.washingtonpost.com/wp-dyn/content/article/2009/02/13/AR2009021301585.html

MIT's Infinite Corridor is 825 ft long.

https://en.wikipedia.org/wiki/Infinite_Corridor