Course
An out-and-back 110-miler and a point-to-point 55-miler through the American Bottom floodplain near Columbia, Illinois. The route loosely follows the American Discovery Trail and the Kaskaskia-Cahokia Trail along the Mississippi River, passing historic sites. Footing is 76% levee path and 24% sealed road, and organisers describe the course as flat and fast.
Key dates
- !RegistrationOpen now
- ★Race daySat 20 Mar 2027
About
This is a unique road ultra on a beautiful course, following the Mississippi River, as you run through the historic American Bottom. Race headquarters is in Columbia, Illinois just outside of St. Louis, Missouri. The race offers a 110 mile and a 55 mile option.
Save American Bottoms 113 to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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Shamrock Shuffle
A Chicago tradition runners return to year after year
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