Hopewell Mound Group

A black and white aerial view of an earthworks complex on a map

Squier & Davis, c.1848

THIS IS NOT where the park visitor center is located. Start your visit at the Hopewell Culture National Historical Park Mound City Group Visitor Center located at 16062 State Route 104, Chillicothe, OH 45601. There you may talk to Park Rangers, view our interpretive film, and pick-up Junior Ranger activities every day of the week.

Hopewell Mound Group

Two thousand years ago, people of an advanced culture gathered here to conduct religious rituals and ceremonies related to their society. At this site, they built an enormous earthwork complex enclosing 55.34 hectares (about 130 acres). An earthen wall extended for over four kilometers (over 2 miles), surrounding an immense sacred space that included 29 burial mounds. Astounding quantities of finely crafted art made of exotic materials were buried here as part of elaborate mortuary ceremonies.

The 300-acre Hopewell Mound Group is the type site for the Hopewell culture. Early archeologists named the site for its owner, M. Cloud Hopewell. The general shape of the Hopewell Mound Group is a parallelogram 1,800 feet long on the east and the west sides and 2,800 feet long on the north and south. Archeologists estimated that the walls were originally 35 feet wide at the base and enclosed an area of 111 acres. A smaller square enclosure with sides 850 feet long is connected to the east side of the parallelogram. Remnants of the east, west, and north walls are visible. Two earthworks features are located within the parallelogram, one circular and one D-shaped. Three of the seven mounds in the D-shaped enclosure are joined. Their original size is estimated to be 500 feet long, 180 feet wide, and 30 feet tall. This is the largest known mound constructed by the Hopewell culture, and a remnant of it is visible today.

This site is accessible for visitors during daylight hours. Hopewell Mound Group has a 2.5 mile interpretive trail and a portion of the Rails-To-Trails bike path. Bikes are only permitted on the bike path, not on the interpretive trail. This site contains restrooms and a covered picnic shelter.

Information on visiting the site today.

A black and white artistic portrait of an ancient earthworks

Squier & Davis 1848


New to Science

The culture discovered at this site was new to the science of archeology in the late 1800’s. Newly described cultures are usually named after the place where they are first discovered. Therefore, the culture was named after this farm field, which happened to be owned by a local businessman in the dry goods business named M. Cloud Hopewell at the time.

The true tribal names of these people were lost over the millennia, but the ancient American Indians who built this sprawling structure were part of a cultural golden age that flourished in this region from A.D. 1 to 400. The monumental architecture and artifacts of the Hopewell culture reflect a pinnacle of achievement in the fields of art, astronomy, mathematics and engineering, the likes of which was seldom seen again in eastern North America.

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A List of Superlatives

Even when compared to all of the other astonishing prehistoric earthworks in the Chillicothe area, Hopewell Mound Group stands out in many regards. This complex included the largest single earthen-walled enclosure constructed by the Hopewell – encompassing over 110 acres. Within its walls was the largest burial mound the Hopewell people ever built: Mound 25 was 500 feet long and 33 feet high. Ephraim Squier’s dramatic 1848 engraving (seen above) pictures this enormous triple peaked mound surrounded by the low earthen wall that formed a smaller D-shaped enclosure within the great enclosure.

This site provided the greatest set, both in quality and quantity, of artistic Hopewell objects ever discovered. Many of the most famous images of the Hopewell culture are from the objects found at this site: the mica bird claw the copper bear paw, and the mica hand with its elongated fingers stretching upward. The artifacts were often made of exotic materials not found in Ohio. A vast trade network appears to have thrived during this period. Huge ceremonial blades made of obsidian from Yellowstone National Park were discovered here. In fact, the total amount of obsidian here was the largest ever found east of the Mississippi River.

While most Hopewell complexes seem to have been used for less than two centuries, evidence suggests that Hopewell Mound Group remained an important ceremonial center throughout the entire era of the Hopewell Culture in Ohio, a period of about four hundred years! All of these extraordinary features support the idea that Hopewell Mound Group was possibly the most important ceremonial center of all the earthworks in southern Ohio.

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Searching for Remnants

Unfortunately, this fabulous earthwork complex fell victim to the same fate that claimed nearly all of the many renowned earthwork complexes of southern Ohio. Two centuries of plowing gradually leveled the sloping earthen embankment walls until they are barely visible today. The mounds that were too large to plow were excavated to below ground level by archeologists in the early 1900’s and never reconstructed. Sadly, the great earthen monuments of this sacred site are now all but invisible to the casual visitor’s eye. However, with some effort, the keen-eyed observer can still find signs of prehistoric grandeur here.

The interpretive trail meanders past some of the site’s significant features. Paralleling the trail on the northwest side of the great enclosure, lies an intact, six-foot-high section of the original 2,000-year-old embankment wall. Use the key on the below map to locate the other visible remnants of the Hopewell Mound Group earthworks.

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Several people working under a white tent next to a white trailer
Archeological crew from Hopewell Culture NHP work under a tent at Hopewell Mound Group during the 2014 field season.

NPS / Tom Engberg

Archeological Expeditions

When Europeans first came to this area in the late 1700’s they were amazed to find so many giant earthworks in the Chillicothe area. Eventually, word spread about the intriguing phenomenon and archeologists arrived to study the earthwork and its burials. The current theories about Hopewell Mound Group and its builders are founded on the scientific conclusions of archeologists who have studied this site over nearly two centuries.

1820: Caleb Atwater draws the first map of these earthworks. Atwater assumes the site had been built for defense. He names the earthworks “Clark Fort” after the owners of the farm field.

1848: Ephraim Squier and Edwin Davis draw the most famous map of the site and include it in their groundbreaking work Ancient Monuments of the Mississippi Valley, the first book ever published by the Smithsonian Institution. They name the complex “North Fork Works,” due to its proximity to the North Fork Paint Creek.

1891-92: Warren Moorehead excavates to find artifacts for the 1893 “World’s Columbian Exposition” in Chicago. By this time, Mordecai Hopewell owns the land. Moorehead partially excavates several of the mounds, including about a quarter of the largest mound, Mound 25. The abundance and exquisite craftsmanship of the artifacts enthralls visitors at the exposition and the concept of the “Hopewell Culture” is born. After the exposition, all the artifacts are stored and displayed in Chicago’s newly created “Field Museum.”

1922-25: Henry Shetrone and William Mills of the Ohio Historical Society excavate all the mounds of what is now called “Hopewell Mound Group.” By this time, many of the mounds and the walls of the square have disappeared under the plow. None of the excavated mounds are reconstructed. Today, the discovered artifacts are stored or displayed at the Ohio Historical Center in Columbus.

1980: Archeologist Mark Seeman of Kent State University accurately relocates most of the mounds through aerial photography and surface survey. By this time, the only part of the earthworks left intact is the wall and adjacent ditch on the north side of the great enclosure.

2001: Using magnetometry, archeologists from the National Park Service and OSU find no evidence of long term settlement within the earthen walls. They also discover a new 90-foot diameter circular earthwork within the great enclosure (the smaller circle on the map between Mounds 2 and 23).

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Visiting the Site

Hopewell Mound Group is one earthwork site that is part of the Hopewell Culture National Historical Park and is located at 4731 Sulphur Lick Road, Chillicothe, OH 45601. Park grounds are open every day during daylight hours. Facilities at Hopewell Mound Group include restrooms, a picnic shelter and a two-mile self-guided interpretive trail. The Tri-County Triangle Trail, a paved bike trail which traverses the site, runs for over thirty miles between Chillicothe and Washington Courthouse. See map below for layout of trail and parking lot access. The parking area at the trailhead is located on Sulphur Lick road, just west of Maple Grove road and the North Fork Creek. THERE IS NO VISITOR CENTER located at Hopewell Mound Group. The park's visitor center is located at Mound City Group 16062 State Route 104, Chillicothe, OH 45601.

Please be mindful that guests in the picnic shelter are not permitted to erect any signs, balloons, or other displays. Additionally, any kind of fire (including charcoal and gas grilling) are NOT permitted in the picnic shelter or on any park grounds at any time. Reservations are not allowed at the picnic shelter--it is first-come, first-served only.

Important Note: Launching, landing and operation of any type of Unmanned Aerial Vehicles (UAV / drones) is not permitted within National Park Service boundaries at any time. It is not restricted to just park operating hours. This is a 24/7 regulation, every day of the year. All sites and areas of Hopewell Culture National HIstorical Park (even parking lots) are included. Please report violations to a ranger or by calling us or emailing us. Read more about Unmanned Aircraft in the National Parks.

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Site Map & Trail Map

A map showing the details of the grounds at Hopewell Mound Group

NPS / Tom Engberg & Bruce Lombardo


Last updated: January 10, 2024

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Contact Info

Mailing Address:

16062 State Route 104
Chillicothe, OH 45601


740 774-1125

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