5,200-Year-Old Canoe Found in Wisconsin Lake

One of the oldest boats ever discovered in North America has been hiding beneath the surface of a Wisconsin lake for over 5,000 years, and it's finally ready to share its story.

Maritime archaeologist Tamara Thomsen has pulled 16 ancient canoes from the same section of Lake Mendota in Madison since 2021. The oldest dugout dates back 5,200 years, making it one of the most significant archaeological finds on the continent.

Now a team of wood scientists, archaeologists, and tribal leaders are working together to understand how these vessels were made and what they reveal about the people who crafted them. Botanist Michael Weimann at the USDA Forest Products Lab identifies which trees were used by slicing tiny wooden samples and examining them under a microscope.

The process isn't easy. Some wood samples are so rotted after thousands of years underwater that lab technician John Haight has to microwave or boil them just to get a clean cut. Sometimes the ancient wood turns mushy like a sponge.

But the effort is paying off. The team has discovered that several canoes were carved from elm, a wood so tough it's difficult to work with even using modern chainsaws. UW-Madison anthropologist Sissel Schroeder tried cutting an elm branch with a chainsaw once and watched it bounce back from the interlocking grain.

That means ancient boat builders were using sophisticated techniques to shape one of the hardest available woods into functional watercraft. They accomplished this feat without metal tools, relying instead on stone implements and controlled burning.

Why This Inspires

Thomsen says tribal partners have told her the canoes are revealing themselves because "they want their stories to be told." Two of the nearly intact vessels are being freeze-dried for display at the Wisconsin History Center opening in 2027, where visitors will see the craftsmanship firsthand.

The remaining canoes are too fragile to move, so they'll stay protected in the lakebed where they've rested for millennia. Wisconsin's database now tracks over 100 dugout canoes found throughout the state, but the Mendota cluster represents the oldest and most significant collection.

For Weimann, each sample is like solving a puzzle. "Once you get all the information, it starts making sense," he says. And with each piece identified, we learn more about the ingenuity and skill of the people who called Wisconsin home thousands of years before us.