American Bottoms 100

American Bottoms 100 Race Information

<p>WELCOME TO THE AMERICAN BOTTOM</p> <p>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.</p> <p>The course will loosely follow the American Discovery Trail and the Kaskaskia - Cahokia Trail (Illinois&#39; first road). You’ll 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. You’ll make your way through many historic sites, including Piggott&#39;s Fort, Fort de Chartres, and the town of Prairie du Rocher.</p> <p>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&#39;re interested in a no frills ultra with a low entry fee, then come test yourself this spring on the American Bottom.</p> <p>110 MILE</p> <p>6:00 a.m. Start. Saturday March 21st, 2026</p> <p>4:00 p.m. Finish. Sunday March 22nd, 2026</p> <p>34 hour cut-off</p> <p>18:32 minute / mile pace</p> <p>1,400 ft. of elevation gain total</p> <p>Out &amp; back course</p> <p>76% levees / 24% hardball road</p> <p>17 Aid Stations</p> <p> </p> <p>55 MILE</p> <p>Saturday March 21st, 2026</p> <p>7:00 a.m. Start</p> <p>10:00 p.m. Finish</p> <p>15 hour cut-off</p> <p>16:21 minute / mile pace</p> <p>700 ft. of elevation gain total</p> <p>Point to point course</p> <p>76% levees / 24% hardball road</p> <p>8 Aid Stations</p> <p> </p>