#Onemileatatime 12 Hour Challenge

#onemileatatime 12 Hour Challenge - June 20, 2026

Revolution Running stages the sixth annual #onemileatatime at Oxbow Meadows in Columbus, GA. The event uses a repeating paved loop of one mile and was changed in 2026 from a 24 hour to a 12 hour format. Participants may complete between one loop and a maximum of fifty miles if they reach the final lap.

The format divides time into 15-minute segments; each segment corresponds to one loop. A participant has exactly 15 minutes to complete the loop and may not start the next loop until the segment ends. Participants must be present in the start-line corral when the bell sounds to continue. This 15-minute segment structure continues for the first ten hours (forty miles). After that the allowed time is reduced by one minute every other lap until the final lap. In the last two hours the per-lap limits progress through 14, 14, 13, 13, 12, 12, 11, 11 and 10 minutes per mile, with the fastest final lap determining the winner among those on the final lap.

The main aid station supplies only water and electrolytes. Participants are expected to bring food, supplies, and crew support and may set up personal tents for aid.

Distances:

• 1 mile paved loop
• Up to 50 miles total if completing the final lap

Prize money is offered to top male and female finishers at tiered levels based on field size: $250 each at 75 runners, $500 each at 100 runners, $1000 each at 125 runners. Registration closes Wed, Jun 17 at 11:59 PM ET. Full refunds are available until three months before the event; after that no refunds are offered. Visit the organization's website for the most recent information.