Black Hills Rail Line, on Spoked Wheels Instead of Steel (NY Times)

From The New York Times:

By GREG BREINING
Published: June 27, 2008

South Dakota's Mickelson Trail is an adventurous, history-laden bike route that runs along a former railroad track.

http://travel.nytimes.com/2008/06/27/travel/escapes/27american.html?ref=escapes