Monks Mound. Mark Lowenstein

Run on the site of a 13th-century Native American urban center! Cahokia was at one time the largest prehistoric Indian community north of Mexico, covering an area of six square miles and including at least 120 mounds. The mounds contained settlements, and were built in part because of the floodplain. Today, a few of the mounds are preserved at the site of Cahokia Mounds State Historic Park. It’s located in East St. Louis, a ~15 minute drive from downtown. The site features a large parking area, visitors center (being renovated as of 2025), several mounds, and ~2 miles of trails on fields around the mounds. For such an important historical site, the whole experience is rather understated.  PRO TIPS: Gorgeous sunsets from the top of the mound. Also, there’s a 5k trail race first weekend in November.

We recommend parking at the Monks Mound parking lot or across Collinsville Rd. at the Visitor Center. At Monks Mound, there are paths around the base of the mound. There are 150 stairs that climb to the top of the mound. Monks Mound is the largest prehistoric earthwork in the Americas, covering 14 acres and rising 100 feet. On the other side of the Mounds parking lot, there’s a large field with a mowed grass path. There are additional paths on the Visitor Center side of the site, around Mound 72. Overall, you can run a few miles within this site, including some laps up & down the stairs/mounds.