Event 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). 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'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