Despite the similarity in name, Cahokia Mounds is not in the city of Cahokia, but is located in Collinsville, Illinois, about ten miles 16 km away. The park entrance is on Collinsville Rd in Collinsville, about 8 mi 12 km from downtown St Louis. The park is located just off of Interstate 55, and not far from Historic Route 66.
By Metrolink Train
MetroLink, St. Louis's public transit light rail system, can take you to the Emerson Park Station in East St. Louis. However, you'll still be about 8 mi 13 km from Cahokia Mounds. You'll need to complete your trip by taxi.
By taxi
If you don't have a car, you'll probably feel that a taxi is your only choice.
Before starting your trip, be sure your driver understands that you are going to Cahokia Mounds in Collinsville, not the city of Cahokia, which is about ten mi 16 km away.
Hours
Hours: Interpretive Center, 9AM-5PM; Grounds: 8AM to dusk.Park is open daily May 1-Oct 31, and open W-Su the rest of the year.
Holidays: Closed: New Year's Day, M.L. King's Birthday, Lincolnâs Birthday, President's Day, Columbus Day, General Election Day, Thanksgiving Day, and Christmas Day. Open: Easter Sunday, Memorial Day, July 4, Labor Day, and Veteran's Day.
By car
From St. Louis or West St. Louis County: Take Interstate 55/70, 64 or Highway 40 & 44 across the Poplar St. Bridge into Illinois. Follow I-55/70, not 64, to Exit 6 Highway 111. Exit and turn right onto Highway 111 south. At traffic signal turn left onto Collinsville Rd. The Interpretive Center is about 1.5 mi 2.5 km on the right.
From North St. Louis County: Take I-270 East into Illinois to I-255. Take I-255 South Memphis to Exit 24, Collinsville Rd. Exit and turn left onto Collinsville Rd at the stoplight at the end of the off-ramp. The Interpretive Center is about 1.5 mi 2.5 km on the left.
From South St. Louis County: Take I-255 across the Jefferson Barracks Bridge into Illinois. Continue on I-255 until Exit 24, Collinsville Rd. Exit and turn left onto Collinsville Rd at the stoplight at the end of the off-ramp. The Interpretive Center is about 1.5 mi 2.5 km on the left.
From Northern and Eastern Illinois via I-55/70: Take I-55 South or I-70 West to the I-255 exit 10, just past Collinsville. Take I-255 South Memphis to the next Exit 24 at Collinsville Rd. Exit and turn left onto Collinsville Rd at the stoplight at the end of the off-ramp. The Interpretive Center is about 1.5 mi 2.5 km on the left.
From Eastern Illinois via I-64: Take I-64 to I-255 North. Take I-255 North to Exit 24, Collinsville Rd. Exit and turn left onto Collinsville Rd at the stoplight at the end of the off-ramp. The Interpretive Center is about 1.5 mi 2.5 km on the left.
From Southern Illinois: Take I-255 North to Exit 24, Collinsville Rd. Exit and turn left onto Collinsville Rd at the stoplight at the end of the off-ramp. The Interpretive Center is about 1.5 mi 2.5 km on the left.
From Lambert St Louis International Airport: 22 Miles Take I-70 East. After crossing the Mississippi River on the Poplar St Bridge, follow I-55/70 to Exit 6 Highway 111. Exit and turn right onto Highway 111 south. At traffic signal turn left onto Collinsville Rd. The Interpretive Center is about 1.5 mi 2.5 km on the right.