Woodhenge poles at sunrise at Cahokia Mounds

Spring Equinox Sunrise Observance at Woodhenge

Join us as we welcome Spring! Meet at the Woodhenge reconstruction or send us an email and we’ll carpool from St. Louis City.

Observe the spring equinox sunrise and learn of the discovery, form and function of an ancient post circle called Woodhenge at Cahokia Mounds State Historic Site that was used as a solar calendar by the Cahokians. No ceremony or ritual is presented. Woodhenge is located 1/2 mile west of Monks Mound and the main entrance to the site.

Time: Arrive by 6:30 am

Atop a ladder at the center post, Bill Iseminger will discuss the discovery and significance of the ancient calendar. Welcome the rising sun with Bill as he has done four times a year, during each solstice and equinox. Out of respect for Native beliefs, no ceremonies will take place during this event.

For more information, call 618-346-5160. Solstice t-shirts will be available for purchase at the event.

{This is a Cahokia Mounds Museum Event}

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Cahokia Mounds site Brochure

The event is finished.


Mar 19 2023


6:30 am - 9:00 pm

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Woodhenge, Fairmont City IL
Collinsville Road, Collinsville IL 62234
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