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Witness ancient brilliance in each of the Hopewell earthworks

Great Circle Earthworks

Great Circle Earthworks

Great Circle Earthworks

Octagon Earthworks

Octagon Earthworks

Octagon Earthworks

Mound City

Mound City

Mound City

Hopewell Mound Group

Hopewell Earthworks

Hopewell Mound Group

Hopeton Earthworks

Hopeton Earthworks

Hopeton Earthworks

High Bank Works

High Bank Works

High Bank Works

Seip Earthworks

Seip Earthworks

Seip Earthworks

Fort Ancient

Fort Ancient

Fort Ancient

A memorable and enriching experience

Events

Yearly Monthly Weekly Daily List
April 2026
NPS Photo / Myra Vick, a thick carpet of garlic mustard plants cover the forest floor.

Garlic Mustard Removal Training

Join us throughout the month of April to combat the invasive plant garlic mustard (Alliaria petiolata)! Volunteers are required to attend one training session to receive information on proper identification and safety techniques for the removal of garlic mustard from park grounds. Step 1: Choose one training dateSaturday, March 149 am, 11 am, or 1...
09 Apr
9:00 am - 11:00 am
Mound City
16062 State Route 104, Chillicothe, OH 45601.
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Turtle Shell Rattle Workshop at Fort Ancient Earthworks & Nature Preserve, a UNESCO World Heritage Site.

Small Turtle Shell Rattle Workshop

Create a sound that carries meaning! This Turtle Shell Rattle Kit offers more than a craft—it’s an experience rooted in rhythm, intention and hands-on creation. Each kit includes a 4–6″ natural turtle shell, alder stick handle, rawhide strips, sinew and a darning needle, giving you everything needed to assemble a traditional-inspired rattle with care and...
11 Apr
1:00 pm - 4:00 pm
Fort Ancient
6123 State Route 350, Oregonia, OH, USA
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NPS Photo / Myra Vick, a thick carpet of garlic mustard plants cover the forest floor.

Garlic Mustard Removal Training

Join us throughout the month of April to combat the invasive plant garlic mustard (Alliaria petiolata)! Volunteers are required to attend one training session to receive information on proper identification and safety techniques for the removal of garlic mustard from park grounds. Step 1: Choose one training dateSaturday, March 149 am, 11 am, or 1...
16 Apr
9:00 am - 11:00 am
Mound City
16062 State Route 104, Chillicothe, OH 45601.
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Seip Goldenrod

Ranger-led Tour of Seip Earthworks

Go beyond Mound City and learn about more of Hopewell Culture National Historical Park’s earthworks with a National Park Ranger. Hopewell Mound Group is the largest of Hopewell Culture National Historical Park’s earthwork sites. 2.4 miles of trail will wind you through 130 acres of astounding architecture. Join our rangers and step back in time!...
16 Apr
10:00 am - 12:00 pm
Seip Earthworks
7058 US 50 East Bainbridge, OH 45612
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Close-up of 3D models of earthwork sites and how the change over time.

Monuments of the Ohio Valley Exhibit Reception

Join us for the opening reception of a new exhibit exploring the remarkable earthworks of the Ohio Valley. Created by Native American cultures, including the Adena, Hopewell, and Fort Ancient between 800 BCE and 1750 CE, these monumental landscapes shaped the region for spiritual, scientific, and cultural purposes. Using cutting-edge LiDAR mapping, aerial imagery, archival...
16 Apr
6:00 pm - 7:00 pm
Octagon Earthworks
125 N. 33rd St., Newark, OH 43055
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Octagon avenue to Circle

Newark Earthworks Lecture Series

Join us at the Octagon Earthworks Visitor Center on the third Thursday of each month as we welcome experts from multiple fields speaking on topics connected to how we understand and learn about Hopewell Ceremonial Earthworks; from archaeological and indigenous perspectives to stories about how Earthworks have been preserved and protected. This program is geared...
16 Apr
7:00 pm - 8:00 pm
Octagon Earthworks
125 N. 33rd St., Newark, OH 43055
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A ranger on tour with a group of visitors at Mound City Group. NPS / Tom Engberg

Ranger-led Tour of Mound City

Go beyond Mound City and learn about more of Hopewell Culture National Historical Park’s earthworks. Join our interpretive rangers for a special tours at  Mound City Group during World Heritage Week. All tours are free, open to the public and do not require registration. Tour will last approximately 1 hour and will cover unpaved, uneven...
17 Apr
10:00 am - 11:00 pm
Mound City
16062 State Route 104, Chillicothe, OH 45601.
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Fall at Fort Ancient Earthworks & Nature Preserve with a light dusting of snow around a tree.

Third Friday Archaeology Tour

Take a walk through the museum and grounds of Fort Ancient at 1 p.m. on the third Friday of each month with Archaeologist Bill Kennedy of the Ohio History Connection. This walking tour gives an overview of pre-contact American Indians in and at Fort Ancient: one of the most outstanding and best-preserved Hopewell earthworks. Please...
17 Apr
1:00 pm - 2:30 pm
Fort Ancient
6123 State Route 350, Oregonia, OH, USA
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crowd at Octagon Earthworks

Third Friday Tours at the Octagon Earthwork with Brad Lepper

Join Senior World Heritage Archaeologist, Brad Lepper, at the Octagon of the Newark Earthworks on the third Friday of every month for a guided tour of this incredible site! Explore the precision and complex geometry of the Octagon that makes clear the ingenuity of Indigenous peoples during the Hopewell Cultural Period. Observe the connection to...
17 Apr
2:00 pm - 3:00 pm
Octagon Earthworks
125 N. 33rd St., Newark, OH 43055
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High Banks Works

High Bank Works Discovery Event

Experience a rare opportunity to visit High Bank Works, open to the public only for special events.  Park staff will share the site’s remarkable lunar and solar alignments, which connect High Bank Works to the Octagon Earthworks, over 60 miles distant! This event is free but does require pre-registration. Call 740-774-1126 ext.110 during business hours...
18 Apr
10:00 am - 1:00 pm
High Bank Works
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Archaeologist Brad Lepper giving a tour to a group of people at the Great Circle Earthworks.

World Heritage Day Open House

Join us on April 18 as we celebrate World Heritage Day at the Newark Earthworks! This special open house invites visitors of all ages to explore two of Ohio’s most remarkable cultural landmarks—the Great Circle Earthworks and the Octagon Earthworks. Both sites will be open from 10:00 AM to 5:00 PM, with hands-on activities taking place from 11:00 AM...
18 Apr
10:00 am - 5:00 pm
Great Circle Earthworks
455 Hebron Road, Heath, Ohio 43056
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NPS Photo / Myra Vick, a thick carpet of garlic mustard plants cover the forest floor.

Garlic Mustard Removal Training

Join us throughout the month of April to combat the invasive plant garlic mustard (Alliaria petiolata)! Volunteers are required to attend one training session to receive information on proper identification and safety techniques for the removal of garlic mustard from park grounds. Step 1: Choose one training dateSaturday, March 149 am, 11 am, or 1...
23 Apr
9:00 am - 11:00 am
Mound City
16062 State Route 104, Chillicothe, OH 45601.
View Detail
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