Ozark Trail 100 Mile Endurance Run

The Ozark Trail 100 Mile Endurance Run returns to Steelville, Missouri on October 31st, marking the eighteenth year of this storied ultra-running event in the heartland. Starting at Bass River Resort just before dawn, runners will embark on a century-plus journey through Mark Twain National Forest along nearly continuous single-track trail. This race is renowned for its pristine Ozark Trail and remote wilderness passages that challenge even seasoned ultramarathoners.
On race morning, Steelville's pre-dawn hours set the stage with temperatures typically ranging from 10.8°C to 22.1°C as runners begin their journey at 6:00 AM sharp under the glow of headlamps and crisp fall air. The atmosphere is imbued with a sense of reverence for both nature’s splendor and human perseverance, where every mile traversed through Mark Twain National Forest contributes to an epic narrative that unfolds uniquely each year.
The Ozark Trail 100 Mile Endurance Run has established itself as one of the Midwest's most celebrated ultra-running events over nearly two decades. With a legacy stretching back since its inaugural run in 2009, this race draws participants from across the country and beyond who come to experience Missouri’s autumn landscapes firsthand. The event not only supports runners but also recognizes local efforts through partnerships with community organizations and charitable causes.
The course itself is an intricate tapestry of single-track trail that winds over rolling hills and through dense forests, demanding respect at every turn with its technical challenges and steep elevation gains totaling approximately 12,000 feet. Crystal-clear stream crossings add to the adventure, ensuring no two miles are alike as runners navigate this point-to-point journey from start to finish.
Weather conditions in Steelville during October can be unpredictable but generally offer a mix of Indian summer warmth and crisp fall mornings. Temperatures average around 16.4°C with occasional wind speeds reaching up to 10.9 km/h, combined with humidity levels averaging at 63.9%. The trail remains firm yet slightly soft underfoot, allowing for a balanced challenge as runners tackle the rugged terrain.
The race offers one distance: a challenging and rewarding 100 Miles | 160.9K run through some of Missouri's most breathtaking fall landscapes.