...a Twitter notice, Armstrong, 38, arrived at Niketown to begin the run. Armstrong, the seven-time Tour de France winner, has twice run the New York City Marathon--in 2006 and 2007. (Photo by Spencer...

Seven-time Tour de France winner and Kazakh cycling team Astana (AST)'s Lance Armstrong of the United States sprints with...

...the Col du Tourmalet during stage fifteen between Bagneres-de-Bigorre and Luz-Ardiden, of the Tour de France on July 21, 2003 in France. Armstrong went on to win his fifth Tour de France...

...lone helicopter flies overhead during stage fifteen from St Gaudens to Piau-Engaly during the 1999 Tour De France. Mandatory Credit: Doug Pensinger /Getty Images

...Froml L to R) British cyclist Mark Cavendish, Tour de France 2009 third-arrived US rider Lance Armstrong and 2nd Luxembourg's Andy Schleck attend the 2010...

PARIS, FRANCE - JULY 17: The French organiser of the Tour de France, Henri Desgrange (L) smiles 17 July 1932 as he poses next...

2008 Tour de France ZOOM Gallery

Hi-res behind-the-scences photos from the biggest bicycle race on Earth.

2008 Tour de France ZOOM Gallery

Hi-res photos from the biggest bicycle race on Earth.

2008 Tour de France ZOOM Gallery

Hi-res photos from stages 5-10 of the biggest bicycle race on Earth.

2008 Tour de France Rider Profile: Ryder Hesjedal

Hi-res photos of Slipstream racer Ryder Hesjedal, inside ESPN's ZOOM Gallery.

2008 Tour de France ZOOM Gallery

Hi-res photos from stages 1-4 of the biggest bicycle race on Earth.

2008 Tour de France Slipstream Profile ZOOM Gallery

Hi-res photos of the names and characters that make up Slipstream.

2008 Tour de France Slipstream Profile ZOOM Gallery

Hi-res photos of the names and characters that make up Slipstream.

Zoom Gallery: 2007 Tour de France

High res photos of the 2007 Tour de France

Alberto Contador captures second Tour de France title in last three years