Notice of 2025 5K Event

Due to unforeseen circumstances, the 5K scheduled for this November will not take place as planned. We look forward to resuming our regular events next year and are excited to announce that our next 5k will be held in November 2026.  Please visit your website’s events page for updates and future announcements.

NOTICE:  Herbicide Spray August 22, 2025

NOTICE: Tomorrow, Friday August 22, the leassee of the agricultural fields on the site will be spraying a herbicide to combat the growing population of invasive Johnson Grass. It’s advised that people stay off the trails/fields north of Collinsville Road for 12 hours.  Signs will be posted at these locations.  If you are planning to walk or otherwise use the grounds tomorrow, the area behind the Interpretive Center, The Grand Plaza, is not near the application of herbicide.  Your understanding in this matter is greatly appreciated as we work to ensure the health of our landscape.

Latino Representation on Public Lands Fosters Diversity and Inclusivity – By Cristhian Flores Trujillo, Conservation Education Representative

Q & A: Domesticated Dogs & Fresh Water – Bill Iseminger

Q & A: Measuring Cahokia – Bill Iseminger

Q & A: Was there any pre-European Seed Trade at Cahokia Mounds – Angela Cooper, Service Specialist II

Why is Cahokia Called “City of the Sun?”… ☀️

Museum Shop Open This Summer!!!

Congratulations 2025 Photo Calendar Contest Winners!

Summer Solstice Sunrise Observance

In-Person Gift Shop Opportunities

Guided Tours Schedule

Cahokia Mounds Legislation Introduced

Deer Archery Hunting Changes to LOTTERY

Photo Calendar Pre-Sale Open Now – May 31, 2024!

CMMS Hosting Photo Calendar Contest Fundraiser!

Spring Native American Market Moves Venues!

Winter Announcement

Goodbye 2023 & Hello 2024!