Sacagawea's son, Jean Baptiste, who was born during the Lewis and Clark expedition, traveled to Europe as a duke's companion before returning to the American West.

Sacagawea endured personal hardships during the expedition

Despite her critical role as interpreter and guide, Sacagawea faced immense challenges on the journey—including caring for her infant and dealing with her abusive husband, Toussaint Charbonneau.

The Lewis and Clark Expedition unexpectedly ran into Sacagawea's long-lost family in the Rocky Mountains.

Sacagawea’s skills and presence were vital to the expedition’s success

The group hired French-Canadian trader Toussaint Charbonneau and his wife Sacagawea to serve as translators. Sacagawea became invaluable to the Corps, as she could speak Shoshone and had a familiarity with the geography of the region. Acting as interpreter and cultural bridge, Sacagawea helped secure Shoshone horses, identified key landmarks, and signaled peaceful intent to other tribes.

Jefferson’s Lewis and Clark expedition joined the centuries-long hunt for Northwest Passage

For centuries, leaders pursued a direct seafaring trade route from Europe to Asia. Jefferson joined this quest by sending Lewis and Clark west, though they confirmed no such practical interior route existed across the continent.

Jefferson sent Lewis and Clark to map, trade, and secure the West

Beyond seeking a water route to the Pacific, Jefferson tasked the Corps of Discovery with mapping the new Louisiana Territory, cataloging its resources, and establishing trade with Native nations.

Meriwether Lewis grew up in the same neighborhood as Jefferson

Hailing from Jefferson’s Albemarle County neighborhood in Virginia, Lewis was a trusted aide and former Army officer. After leading the Corps of Discovery, he became Louisiana Territory governor in 1806, dying three years later under mysterious circumstances.

Explore Lewis and Clark's 8,000-mile journey in Google Earth.

Lewis and Clark identified 122 animal species new to science.

The Lewis and Clark expedition lasted over two years

The Corps of Discovery departed St. Louis in May 1804 and returned in September 1806, covering more than 8,000 miles by boat, horseback, and on foot. See a timeline of the journey’s key events.

Jefferson omitted a plan to go beyond the Louisiana Territory in his funding request

In January of 1803, the president sought $2,500 to fund the expedition (though it likely cost closer to $50,000). The ostensible rationale for the journey was to explore the newly purchased territory, but Jefferson did not mention he wanted Lewis and Clark to go beyond the newly acquired territory for several reasons.

William Clark negotiated one-tenth of all ratified treaties between Native Americans and the US.

Lewis and Clark encountered more than 70 Native tribes during their journey

The Corps of Discovery’s diplomacy ranged from peaceful trade and vital aid from tribes like the Shoshone and Nez Perce to tense standoffs, most notably with the Teton Sioux, who nearly brought the expedition to a halt.

The expedition included Clark’s enslaved servant, York

York, Clark’s enslaved servant, played a full role in the expedition—hunting, scouting, and aiding diplomacy with Native nations who were fascinated by his appearance. Despite his contributions, York remained enslaved for some time after the journey, though its uncertain if he remained so for the rest of his life. Explore every member of the Corps of Discovery here.

Native voices share their histories along the Lewis and Clark National Historic Trail

Tribal historians recount their peoples' histories and perspectives on the Lewis and Clark expedition, offering an Indigenous narrative of the lands, encounters, and legacies that shaped the journey.

The Lewis and Clark expedition purchased more than 260 separate items to supply their journey.

Lewis and Clark’s journey became a blueprint for future exploration

Combining science, diplomacy, and logistics, the Corps of Discovery created a model for later expeditions—from charting the Arctic to NASA’s space missions.

Sculptor and painter Charles M. Russell focused on the Old West

The Montana artist, known for his realistic portrayals of cowboys and Native American life, began to gain national attention after traveling to New York and establishing connections in the art world. Still, he spent most of his time in Great Falls, Montana, where he completed approximately 4,000 works.

At age 22, Washington inadvertently started the French and Indian War

In 1754, while leading a small Virginia militia force in the Ohio Valley, Washington's troops ambushed a French scouting party. The clash heightened tensions between Britain and France and sparked a broader conflict that soon spread across North America, Europe, and parts of Africa and Asia.

Montana's Fort Shaw Indian Boarding School was home to a world champion girls' basketball team

In 1904, the school, featuring players from multiple tribes in Montana and Idaho, won the championship at the 1904 Louisiana Purchase Exposition (also known as the St. Louis World Fair).

The Corps of Discovery braved wildlife, weather, and near-starvation

Along their 8,000-mile trek through territory populated by tribes suspicious of their intentions, Lewis and Clark’s party faced many dangers—including grizzly bear attacks, freezing winters, treacherous river crossings, and periods of near-starvation. Watch a 30-minute elaboration of their heroic efforts here.

Clark’s maps provided the first detailed record of the American West

Covering over 8,000 miles, William Clark’s maps charted rivers, mountains, and tribal territories with remarkable accuracy. Equipped with sextants, compasses, telescopes, and more, Clark became an expert at surveying—requiring extensive celestial and topographical observations each day.

The Lewis and Clark Expedition brought along an estimated 120 gallons of whiskey and still ran out of alcohol halfway through the journey.

John Marshall maintained a lifelong connection to George Washington

Marshall served under Washington in the Continental army, later delivered a memorial address following his death, and chaired the funeral arrangements. He also authored a five-volume, 3,200-page biography, "The Life of George Washington."

The expedition documented 240 plant species, 178 new to western science

Lewis and Clark’s botanical records introduced species to Americans like bitterroot, ponderosa pine, and Oregon grape—plants unknown to western science at the time. See a selection of these species in this image gallery.

Lewis brought his loyal Newfoundland dog on the expedition

Meriwether Lewis was accompanied by his dog, Seaman, a Newfoundland who traveled the entire journey—helping hunt, guarding camp, and even rescuing supplies from a river.

The expedition produced the first detailed climate records of the West

Lewis and Clark logged daily temperature, weather, and seasonal patterns throughout their journey, creating the earliest systematic meteorological record for the western territories of the United States. Their observations helped overturn longstanding views that weather west of the Appalachians was similar to the East Coast.

Discover the 'American Serengeti' Lewis and Clark first recorded

This podcast traces the 19th-century exploration of the Great Plains' biodiversity—beginning with Lewis and Clark's wildlife cataloging and continuing through a century of documenting the Natural West's remarkable species and landscapes.

Jefferson feared European control in the West of North America

Jefferson pushed for the Louisiana Purchase to prevent France or Spain from dominating the western frontier, securing control of the Mississippi River and vast lands that he felt were essential to America’s strategic and economic future.

Niagara’s honeymoon tourism was influenced by Napoleon's brother

Niagara falls was once dubbed the “honeymoon capital of the world.” This tradition partially began with a visit by Napoleon's brother Jerome and his wife in 1804.

The Louisiana Purchase nearly doubled America’s size in 1803

Acquired from France for $15M, the Louisiana Purchase added 828,000 square miles to the United States—stretching from the Mississippi River to the Rockies. US ambassadors in France signed the papers to buy the tract from the embattled Napoleon Bonaparte for a mere $15M before Jefferson learned the terms, due to the advantageous nature of the deal.

James Hemings, Jefferson's cook, popularized mac and cheese in the US

The statesman sent Hemings to France to sharpen his culinary skills where he picked up recipes of baked pasta with cheese and butter. The recipe Hemings likely dictated to Jefferson was later used in an 1802 White House dinner, the first major public dinner in the US to include the dish.

Jeff Bezos’ biological father and mother married as teenagers—and had Jeff a year later

His biological father, Ted Jorgensen, was a circus performer at the time. He later gave up custody of Jeff and became a bicycle repairman in Phoenix, Arizona. Ironically, the last time Jorgensen saw Jeff as a child was in a Walmart where Jorgensen worked. This video dives into the relationship between Jeff Bezos and his estranged biological father, who passed away in 2015.

A tense standoff with the Teton Sioux nearly ended the expedition

In 1804, the Teton Sioux seized a Corps of Discovery boat during a Missouri River meeting, sparking a dangerous standoff. The conflict eased only after careful diplomacy.

The ghost of Bobby Dunbar

In 1912, a four-year-old Louisiana boy went missing for eight months. Contemporary accounts differed in his mother's reaction upon seeing him; some claimed she was overjoyed, others that she didn't recognize him. Shortly after, a second woman claimed the child was hers, though he remained with the first woman. In 2004, DNA analysis determined the child had not been related to the family, suggesting the kidnapping was never solved.

Voltaire's writing sent him into exile

In 1717, the writer's satirical poem "La Henriade" landed him in prison for a year. By 1726, the French government's distaste for his work caused him to leave the country for England, though he returned a few years later. That would be short-lived: In 1734, his "Lettres Philosophiques" sent him packing again, moving to Champagne, then Berlin, then Switzerland, before finally returning to Paris in 1778.

Marshall served in the Continental army under Washington

Before his judicial career, Marshall served in a Virginia regiment during the American Revolution, rising to the rank of captain. He fought at Brandywine and Monmouth, endured the winter at Valley Forge, and developed a personal connection with Gen. George Washington.

Unconditional birthright citizenship is rare outside the Americas

Around 30 countries, mostly in the Americas, grant automatic citizenship by birthplace. Elsewhere—especially in Europe, Asia, and Africa—citizenship typically follows jus sanguinis, based on parental descent rather than location of birth.

Americans touring the Louvre were inspired to create their own grand museums

The one-time royal residence was first transformed into a public museum in 1793 amid the French Revolution. Americans visiting in the early 1800s were both turned off by the aristocratic grandeur and compelled by the open access to the public. James Fenimore Cooper, the author of "The Last of the Mohicans," apparently came and measured the length of galleries.

Washington systematically introduced and popularized mule breeding in the United States

Known as "the father of the American Mule," Washington imported a prized Spanish donkey and bred it with a female horse at Mount Vernon. He promoted mules as stronger, more efficient farm animals, helping spread their use across the South and transforming American agriculture.