Tour de France Stage 17
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Tour de France Stage 17

July 20, 2006

Each year in July, close to 200 professional cyclists converge on France for the most prestigious and grueling bike race in the world: the Tour de France.

The three-week stage race traverses France with excursions into neighboring countries, scaling peaks in both the Pyrenees in the south and the Alps in the east. The race always finishes in front of hundreds of thousands of fans along the Champs-Élysées, a famous Paris street.

This image from the Enhanced Thematic Mapper Plus sensor on NASA's Landsat satellite shows the terrain of the 17th stage of the race—the final day in the mountainous terrain of the Alps. The stage starts in the town of Saint-Jean-de-Maurienne and finishes in Morzine; the day's ride is 200.5 kilometers (124.6 miles.) From Saint-Jean-de-Maurienne, the route takes riders north, roughly following the route of the Arc River, which flows northwest, where it eventually meats the Arly River.

Beyond the Arly River, riders climb four steep passes more than 1,400 meters in altitude. The first, Col des Saises, is 1,650 meters tall, and the last, Col de Joux-Plane reaches 1,700 meters over 11.7 km with an average gradient of 8.7 percent. From Col de Joux-Plane, riders race downhill into Morzine.

Like other towns visible in the image, Morzine forms a gray spot against the green landscape of France's Savoie and Haut-Savoie regions. Geneva, Switzerland, is the grey region on the shores of Lake Geneva in the upper left corner of the image.

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