The chocolate Labrador retriever named Boogie ran most of the 13.1 miles in Saturday's Evansville event and then was taken to Animal Control.
Owner Jerry Butts tells a local newspaper that the 100-pound dog slipped his leash Friday night. It was his fourth escape.
Butts says Boogie now has a microchip and an appointment to be neutered.
Boogie finished the race in 2 hours, 15 minutes. That's better than more than half of the race's participants.