#Onemileatatime 12 Hour Challenge
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Event
The #onemileatatime 12 Hour Challenge is the sixth annual edition of a timed running event held at Oxbow Meadows, 3535 S. Lumpkin Rd, Columbus, GA. The event uses a Last Man Standing format and was changed in 2026 from a 24 hour format to a 12 hour format. Registration closes on June 17.
Course and format
Participants run repeated laps of a 1 mile paved loop. Each lap must be completed within 15 minutes; runners who are not present in the start-line corral at the bell are removed. For the first 10 hours competitors use the 15-minute lap interval (equivalent to up to 40 miles). In the final 2 hours the allowed lap time is reduced every other lap, progressing through 14, 13, 12, 11 and 10 minute-per-mile slots; if multiple runners complete the final lap (mile 50) the fastest final lap determines the winner.
Aid and logistics
The main aid station provides water and electrolytes only. Runners are expected to bring their own food and supplies and may set up personal tents or have a crew to support them on site.
Prizes and refunds
Prize money for top male and female finishers is tiered by field size: $250 each at 75 runners, $500 each at 100 runners, and $1,000 each at 125 runners. Runners may receive a full refund up to three months before the event; no refunds are issued after that point. Visit the organization's website for the most recent information.
