American Bottoms 100
- Date Sat 21st March 2026
- Location Columbia, Illinois
Event summary
Get ready for an unforgettable experience at the American Bottoms 100, taking place on Saturday, March 21, 2026, in beautiful Columbia, Monroe, just outside of St. Louis, Missouri. This unique road ultra offers an exhilarating challenge with two race distances: a 110-mile option for the seasoned ultrarunner and a 55-mile course for those looking to push their limits.
As you traverse the stunning landscape along the Mississippi River, you'll find yourself immersed in history, passing iconic sites such as Piggott's Fort and Fort de Chartres. The course is flat and fast, making it perfect for both first-timers and those aiming to set personal records. With generous cut-off times, plenty of aid stations, and a welcoming atmosphere, the American Bottoms 100 is a fantastic opportunity to test your endurance this spring. Join us for a memorable race that promises beautiful views and a supportive community!
As you traverse the stunning landscape along the Mississippi River, you'll find yourself immersed in history, passing iconic sites such as Piggott's Fort and Fort de Chartres. The course is flat and fast, making it perfect for both first-timers and those aiming to set personal records. With generous cut-off times, plenty of aid stations, and a welcoming atmosphere, the American Bottoms 100 is a fantastic opportunity to test your endurance this spring. Join us for a memorable race that promises beautiful views and a supportive community!
Organiser's Description
WELCOME TO THE AMERICAN BOTTOM
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.
The course will loosely follow the American Discovery Trail and the Kaskaskia - Cahokia Trail (Illinois' first road). Youll watch the sun rise over the Illinois bluffs while running on levees and deserted backroads, from Columbia to the confluence of the Kaskaskia and Mississippi Rivers. Youll make your way through many historic sites, including Piggott's Fort, Fort de Chartres, and the town of Prairie du Rocher.
This is a flat and fast course with generous cut off times, plenty of aid stations, and a friendly atmosphere. It will make a great first hundred miler, or a chance for you to set a new personal record at this distance. So, if you're interested in a no frills ultra with a low entry fee, then come test yourself this spring on the American Bottom.
110 MILE
6:00 a.m. Start. Saturday March 21st, 2026
4:00 p.m. Finish. Sunday March 22nd, 2026
34 hour cut-off
18:32 minute / mile pace
1,400 ft. of elevation gain total
Out & back course
76% levees / 24% hardball road
17 Aid Stations
55 MILE
Saturday March 21st, 2026
7:00 a.m. Start
10:00 p.m. Finish
15 hour cut-off
16:21 minute / mile pace
700 ft. of elevation gain total
Point to point course
76% levees / 24% hardball road
8 Aid Stations
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.
The course will loosely follow the American Discovery Trail and the Kaskaskia - Cahokia Trail (Illinois' first road). Youll watch the sun rise over the Illinois bluffs while running on levees and deserted backroads, from Columbia to the confluence of the Kaskaskia and Mississippi Rivers. Youll make your way through many historic sites, including Piggott's Fort, Fort de Chartres, and the town of Prairie du Rocher.
This is a flat and fast course with generous cut off times, plenty of aid stations, and a friendly atmosphere. It will make a great first hundred miler, or a chance for you to set a new personal record at this distance. So, if you're interested in a no frills ultra with a low entry fee, then come test yourself this spring on the American Bottom.
110 MILE
6:00 a.m. Start. Saturday March 21st, 2026
4:00 p.m. Finish. Sunday March 22nd, 2026
34 hour cut-off
18:32 minute / mile pace
1,400 ft. of elevation gain total
Out & back course
76% levees / 24% hardball road
17 Aid Stations
55 MILE
Saturday March 21st, 2026
7:00 a.m. Start
10:00 p.m. Finish
15 hour cut-off
16:21 minute / mile pace
700 ft. of elevation gain total
Point to point course
76% levees / 24% hardball road
8 Aid Stations
Races
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Location
11604 Bluff Rd, Columbia, 62236, IL, United States
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American Bottoms 100
