American Bottoms 100
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About the race
American Bottoms is a road ultra held in Columbia, Illinois, running through the historic American Bottom along the Mississippi River and following portions of the American Discovery Trail and the Kaskaskia - Cahokia Trail. Race headquarters is in Columbia, Illinois, just outside St. Louis, Missouri.
The event offers these distances:
- 113 Mile, out and back course, 1,591 ft elevation gain, 17 aid stations
- 56 Mile, point to point course, 791 ft elevation gain, 8 aid stations
The course uses a mix of surfaces, approximately 51% pavement and 49% gravel, and routes include levees and low-traffic backroads. Runners pass several historic sites, including Piggott's Fort, Fort de Chartres, and the town of Prairie du Rocher. Reported cut-off times and pacing guidance are provided by the organizer: the 113 mile distance has a 35 hour cut-off and an 18 minute 30 second per mile pace guideline, while the 56 mile distance has a 17.5 hour cut-off with the same pace guideline.
A veteran and first responder discount of 15% is offered; a coupon code is available through the event contact channels. Elevation totals and the number of aid stations are listed for each distance to help with planning. Visit the organization's website for the most recent information.
