Lewis and Clark Went Looking for a River That Didn't Exist

Thomas Jefferson asked Congress for $2,500. The final bill came in around $38,000, which tells you most of what you need to know about how the next two and a half years went.

The confidential message went to Capitol Hill in January 1803, months before the Louisiana Purchase made the whole thing legal. Jefferson wanted a water route. His written instructions to Meriwether Lewis said it plainly: explore the Missouri, find "the most direct & practicable water communication across this continent" for the purposes of commerce. Portage over a ridge somewhere, drop into a west-flowing river, sail to the Pacific. Every serious map of the era assumed something like it existed.

It didn't. Finding that out cost 8,000 miles and nearly killed all of them.

The two men who shouldn't have worked

Lewis was 29, Jefferson's private secretary, a Virginian with a scientific mind and a temperament that ran dark. He'd been crash-schooled in Philadelphia by the best minds in the country — botany, celestial navigation, medicine — the way you'd cram a man before an exam he can't retake.

He asked William Clark, 33, to share command. Clark was a frontier soldier, older brother of George Rogers Clark, steadier by half, and the better waterman and mapmaker of the two. Lewis wrote to him offering equal rank and equal authority.

The War Department said no. Clark's commission came back as a second lieutenant, not a captain.

Lewis never told the men. For twenty-eight months, every private in the Corps of Discovery addressed both of them as Captain, and Lewis treated Clark as an equal in every order, every decision, every disputed fork in the river. Shared command is supposed to be a disaster. This one produced no recorded quarrel between them in the entire journey. That's not luck. That's two men choosing, daily, not to let ego eat the mission.

Upriver, and the first grave

They pushed off from Camp Dubois on May 14, 1804 — a 55-foot keelboat and two pirogues, poled and towed and rowed against the Missouri's current. Rope-hauling a loaded keelboat upstream is brutal, dull labor, and they did it for months.

On August 20, near present-day Sioux City, Sergeant Charles Floyd died. The journals describe abdominal agony; modern reading points to a ruptured appendix, which nothing in Lewis's medicine chest could have touched. They buried him on a bluff and named the river below it for him.

He was the only man they lost. Consider what that meant in 1804: thirty-odd men, two winters outdoors, grizzly bears, whitewater, no antibiotics, and one death, from something a surgeon today handles before lunch.

Late September brought the Teton Sioux near present-day Pierre. A chief grabbed the pirogue's cable. Bows came up. Clark drew his sword, Lewis ordered the swivel gun manned, and for a long minute the entire expedition hung on whether anybody's nerve broke. Nobody fired. They moved on upriver, and the captains spent that night writing about how close it had been.

Fort Mandan

They wintered near present-day Washburn, North Dakota, among the Mandan and Hidatsa, in cold that froze mercury and cost several men frostbitten feet. It was there they hired a French-Canadian trader named Toussaint Charbonneau, mostly because of his wife.

Sacagawea was Lemhi Shoshone, roughly sixteen, taken years earlier in a raid and living hundreds of miles from her people. On February 11, 1805, she went into a long and difficult labor. Lewis, out of ideas, crushed a rattlesnake's rattle into water on a trader's suggestion. The baby came shortly after. Lewis, being honest, wrote that he wasn't sure the remedy deserved credit.

Jean Baptiste Charbonneau made the entire round trip to the Pacific strapped to his mother's back.

The month that broke their backs

In June 1805 the river forked, and the whole expedition turned on picking right. Every experienced man in the Corps voted for the north fork. The captains scouted, studied the water's color and speed, and chose south. The men, to their credit, said they'd follow either way. The captains were right — the north branch is the Marias, and had they taken it, the Corps would have wandered into the Rockies with winter coming.

Then came the Great Falls. The portage they'd hoped might take half a day took about a month and covered roughly eighteen miles of open plain. They built wagon trucks out of cottonwood, hauled canoes and baggage over ground carpeted in prickly pear that went straight through moccasins, in heat, harassed by grizzlies, and at one point flattened by a hailstorm that knocked men to the ground and left them bleeding.

Lewis's iron-framed boat, his own pet design, leaked and was abandoned. Some men collapsed in their tracks and slept where they fell. Nobody quit.

The moment the dream died

August 12, 1805. Lewis walked ahead to the crest of Lemhi Pass, on what's now the Montana-Idaho line, expecting to look down a gentle slope toward a river running to the sea.

He saw mountains. Range behind range, snow on them in August, going on to the horizon.

That was the answer to Jefferson's question, delivered in a single glance. There was no easy water route. There never had been. A lesser man reframes it in his report. Lewis wrote it down straight and kept walking.

Five days later, a stroke of providence nobody could have engineered: the Shoshone chief they'd found, Cameahwait, turned out to be Sacagawea's brother. The Corps got horses. Without those horses they don't cross the Bitterroots.

They nearly didn't anyway. Eleven days on the Lolo Trail in September snow, eating candles, portable soup, and their own colts. They came down onto Weippe Prairie half-dead and were fed by the Nez Perce — who, by their own oral tradition, debated killing them and were talked out of it by a woman named Watkuweis, who had once been treated kindly by white traders.

Ocian in view

Down the Clearwater, the Snake, the Columbia. On November 7, 1805, Clark wrote in his spelling-optional hand: "Ocian in view! O! the joy." He was looking at the estuary, not the Pacific, but let the man have it.

On November 24 they took a vote on where to winter. Every member cast one. That included York, Clark's enslaved manservant, and Sacagawea — a Black man and an Indian woman voting on equal terms with U.S. Army privates, decades before the law would allow it anywhere in the Republic. It's one of the strangest and most American moments in the record, and it sits right beside the fact that York went home to St. Louis and wasn't freed.

Fort Clatsop was a miserable winter of rot and rain. They left March 23, 1806, split the party on the way home to cover more ground, and Lewis's group ran into trouble on the Two Medicine River on July 27 — a scuffle over stolen guns and horses that left two young Piikani men dead. It was the only bloodshed of that kind in the whole expedition, and it stained the return.

Two weeks later, Pierre Cruzatte, blind in one eye, shot Lewis through the thigh while hunting elk. Clark dressed the wound. They reached St. Louis on September 23, 1806, to a town that had given them up for dead.

What came after

Every man got double pay and 320 acres. The captains got 1,600 apiece. They'd brought back some 178 plants and 122 animals unknown to science, the first reliable map of the interior, and the correct answer to the wrong question.

Lewis was dead three years later at a roadhouse on the Natchez Trace, at 35, by his own hand as far as Jefferson and Clark ever believed. Sacagawea likely died in 1812 at Fort Manuel; Clark raised her son and educated him. York asked for his freedom, Clark refused for years, and the record of when he finally got it's thin and unflattering to a man otherwise worth admiring.

Clark himself lived to 1838, ran Indian affairs in the West, and kept the map.

The Northwest Passage was a fantasy. What Lewis and Clark actually proved is that the continent could be crossed by men willing to haul a boat eighteen miles over cactus. Every wagon train that followed was betting on that one piece of information.