David Thompson (explorer)
A man who walked and paddled across a continent, mapping nearly 5 million square kilometers of North America with astonishing precision.
1770–1857 (age 87)·Canadian fur trader and surveyor·Birthday: April 30
Biography
David Thompson was the quiet force who drew the lines on the map. As a teenager apprenticed to the Hudson's Bay Company, a fall into a creek damaged his eyesight, grounding him from fur trading and turning him toward the precise science of surveying. What followed was a thirty-year odyssey of relentless travel. Thompson didn't just explore; he observed, calculated, and recorded. He traversed the Rockies, found routes for the fur trade, and lived closely with Indigenous communities, earning the name 'Koo-Koo-Sint' (the Stargazer). His greatest work, a map of the Northwest from Lake Superior to the Pacific, was a masterpiece of pre-industrial cartography, compiled from his own celestial observations and painstaking measurements. In an age of boastful explorers, Thompson was the meticulous scribe, and his forgotten journals, published long after his death, revealed the true scale of his geographic genius.
#1 When David Was Born
The biggest hits of 1770
David's Life & Times
The world at every milestone
1770Born
1775Started school
1783Became a teenager
1786Could drive
1788Could vote
1791Turned 21
1800Turned 30
1810Turned 40
1820Turned 50
1830Turned 60
1840Turned 70
1850Turned 80
1857Died at 87
Key Achievements
- Mapped over 4.9 million square kilometers of North America, an area five times the size of the Louisiana Purchase.
- Completed the first European descent of the entire length of the Columbia River to the Pacific Ocean in 1811.
- Created the 'Great Map' of the Northwest in 1814, the definitive cartographic document of the region for decades.
- Travelled an estimated 90,000 kilometers on foot, canoe, and horseback over his career.
Did You Know?
He was married to Charlotte Small, a Métis woman, for 58 years; they had 13 children together.
Thompson used a sextant and chronometer for his surveys, taking lunar observations to determine longitude.
He died in poverty and relative obscurity in Montreal; his contributions were not widely recognized until the 20th century.
“I have traveled fifty-five thousand miles in this country by canoe and foot.”
