Edgington Mound
Washington Township, Clermont County, Ohio
Marker Inscription
This burial mound was built during the time period 1000 B.C. to 400 A.D. Because the 15 foot 9 inch mound is conical shaped, it is believed to have been built by the Adenda Culture.
Erected by Clermont County
The Story
Long before Ohio was farmland and township roads, the Ohio Valley was home to the Adena, one of North America's earliest mound-building peoples, who flourished from roughly 1000 B.C. into the early centuries A.D. This conical earthwork—nearly sixteen feet high—is a burial mound, raised basketful by basketful of earth over the dead in a tradition that spread across the Eastern Woodlands. Its shape and dimensions place it among the hundreds of such mounds that once dotted southern Ohio, quiet monuments to a society that thrived here for well over a thousand years.
Why it matters
The Adena mounds are among the oldest surviving human-made landmarks in the American interior, evidence of a complex Indigenous civilization that shaped the land millennia before European arrival.
The story behind this marker
AI contextThe era
Long before this corner of Ohio had a township name or a county line, it belonged to a much older world. The land above the Ohio River was home to the people we now call the Adena, one of the earliest mound-building cultures of eastern North America. They lived here across the long span archaeologists call the Early Woodland period, flourishing from roughly a thousand years before the common era into the early centuries A.D.
This was not a wilderness passing empty of history. It was a settled cultural landscape. The Adena hunted the forests, fished the rivers, tended early gardens of native plants, and gathered at places that mattered to them. Among the most enduring things they left behind were their earthworks — deliberate, engineered rises of soil built to hold their dead.
A mound like this one is a marker of that deep past. Its conical form is the signature shape of the Adena, and it places this quiet rise in Clermont County among the oldest human-made monuments still standing in the American interior — raised while much of the rest of the continent's recorded history had not yet begun.
People & events
The people tied to this place did not leave their names, but they left their intentions written in earth. An Adena burial mound was rarely thrown up in a single season. More often it grew over generations, a shape that rose as the community returned again and again to honor its dead.
Picture the work itself. There were no wheelbarrows and no draft animals — the soil was carried by hand, basket-load by basket-load, and layered above the honored dead. Each burial could bring a fresh mantle of earth, so that the mound you see is really an accumulation of many acts of remembrance stacked one atop another until it reached its full height.
That is the human story a mound preserves. Not a single event on a single day, but a relationship between a people and a place, sustained across lifetimes. Those who built it are gone, yet the care they took is still legible in the ground they shaped.
Its place in the American story
It is easy to imagine American history beginning with European arrival, but earthworks like this one tell a far older story. The Adena, and the Hopewell culture that followed and overlapped with them, built thousands of mounds and enclosures across the Ohio Valley and the wider Eastern Woodlands — evidence of complex, organized Indigenous societies that thrived here for well over a thousand years.
This mound is one small piece of that vast achievement. Southern Ohio was a heartland of ancient mound-building, and sites like this connect a roadside rise in Clermont County to a civilization whose reach and ambition are only fully visible when you see the whole pattern spread across the region.
Many such mounds did not survive the centuries. Plowing, road-building, and development leveled countless earthworks before their importance was understood. That this one still stands makes it more than a curiosity — it is a rare surviving landmark of the people who shaped this land millennia before the country that surrounds it existed.
If you visit
What you'll find is deceptively simple: a rounded rise of earth, well over a dozen feet high, holding its shape against the flatter ground around it. Give yourself a moment to register the scale, then remember that every foot of it was carried here by hand. Once you know what you're looking at, an ordinary-looking hill becomes something close to astonishing.
Approach it as what it is — a grave, and a sacred one. This is a burial place built by people who returned to it with reverence, so it deserves the same from a visitor. Look, reflect, and tread lightly rather than climbing or disturbing the mound.
It also makes a fine anchor for a deeper kind of road trip. Southern Ohio is unusually rich in ancient earthworks, and once your eye is trained to notice these quiet rises in the landscape, you'll start seeing the older America that lies just beneath the modern one — and this mound is a good place to begin.
Written by AI to add context, grounded in the marker’s inscription and the historical record. The inscription above is the original, unaltered text.
Plan your visit
NearbyMake a day of it — museums, food, and places to stay near this marker.
Food & drink
- Karen’s Hi-Port12.3 mi away
- Our Place at Hi-Port12.4 mi away
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Themes & tags
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