Pittsburgh's Golden Triangle - 1803
The Lewis and Clark Expedition

The Golden Triangle 1803

In 1803, Pittsburgh was the launching pad for Lewis and Clark's Expedition to explore the lands west of the Mississippi River, obtained from France through the Louisiana Purchase. It was an adventure that changed the course of American history, and it all began in Pittsburgh.

On July 15, 1803, Meriwether Lewis arrived in this small frontier town of just 1,600 people, with instructions from President Thomas Jefferson to supervise preparations for an expedition westward to find and map a transcontinental water route to the Pacific Ocean. The expedition finally got under way from Pittsburgh on August 31, 1803, beginning a three-year journey across the country and into American lore.

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