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Serpent Mound

The world's most spectacular effigy mound
  • Address
    Contact Information
  • Admission
    • Vehicle: $8.00
    • OHC Member: Free

    Starting April 2015
    Mon-Fri: 10 a.m.–4 p.m.

    Starting May 2015
    Mon-Sat: 10 a.m.–4 p.m.

    June-October 2015
    Fri-Sun: 9 a.m.–6 p.m.

    November-December 20, 2015 
    Sun-Sat: 10 a.m.–4 p.m.

    $40.00/day Serpent Mound's picnic shelter may be reserved in advance for exclusive use by a group. At this time, there is no electrical service at the shelter. Please contact the park for reservations at 800-752-2757.

  • Historical Topics
    • American Indian History
    • Archaeology
    • Natural History
    • Southwest Ohio
    • All Audiences


Serpent Mound is an internationally known National Historic Landmark built by the ancient cultures of Ohio. It is an effigy mound (a mound in the shape of an animal) representing a snake with a curled tail. Nearby are three burial mounds – two created by the Adena Culture (800 BC-100 AD), and one by the Fort Ancient Culture (1000-1650 AD). The Serpent Mound has no associated burials and was likely used for ceremonial purposes.
Thousands of years ago Native Ohioans populated the landscape with mounds and massive earthworks. In the late nineteenth century, Harvard University archaeologist Frederic Ward Putnam excavated Serpent Mound, but he found no artifacts in the Serpent that might allow archaeologists to assign it to a particular culture. Based largely on the nearby presence of Adena burial mounds, later archaeologists attributed the effigy to the Adena culture that flourished from 800 B.C. to A.D. 100.This theory on the site’s origin was accepted until a 1991 site excavation used radiocarbon dating to determine that the mound was approximately 900 years old. This would suggest the builders of the Serpent belonged to the Fort Ancient culture (A.D. 1000-1500). In 2014, another team of archaeologists presented new radiocarbon dates for the Serpent suggesting it was built by the Adena culture at around 300 B.C.. More work is needed to clarify the age of Serpent Mound.

The significance of Serpent Mound and other ancient Ohio earthworks has garnered international attention. In 2008, Serpent Mound and eight other Ohio earthworks were selected by the United States Department of the Interior for inclusion on the United States’ Tentative List of sites to be submitted to United Nations Educational, Scientific, and Cultural Organization (UNESCO) for inscription on the prestigious World Heritage List. If it is eventually inscribed on the World Heritage List later this decade, Serpent Mound will join the ranks of the Pyramids of Egypt, the Great Wall of China, Pompeii, Stonehenge, and the Taj Mahal—all of which are World Heritage sites. World Heritage status has the potential to elevate local and international awareness about the site's value, further encourage communities to protect and invest in their preservation and increase potentially beneficial tourism to the site. 

Serpent Mound is managed locally by the Arc of Appalachia Preserve System.


Public Meeting Notice

Public comments sought on new site management plan

Read the proposed site management plan:
Serpent Mound Draft Site Management Plan

The Ohio History Connection and the Arc of Appalachia will hold a public meeting on April 21 to discuss a new site management plan for Serpent Mound. The public meeting will be held at 6 p.m. at Peebles High School, 25719 OH-41, Peebles, OH 45660.
A site management plan sets goals and priorities to guide decisions concerning the development, use, interpretation, study and preservation of a historic site. It also directs operations and maintenance to ensure the cultural and natural resources of the site are respected and protected.
This proposed plan will be used by the Ohio History Connection and local management organization, the Arc of Appalachia, to guide the day-to-day operation of the site and for making long-term decisions and plans for the benefit of the site.
Serpent Mound is an internationally known National Historic Landmark built by the ancient peoples of Ohio. Serpent Mound represents the peak of pre-contact effigy mound-building in North America. It has become an icon of indigenous cultural achievements in this region, chiefly because of its enormous scale and its remarkable resemblance to a serpent.
Comments on the proposed site management plan will be considered when defining the final site management plan for Serpent Mound.
The public comment period is from April 3 through April 21. Comments on the proposed plan will be considered if sent via email to spcomments@ohiohistory.org or if made in person at the public meeting on April 21.

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