Korean robot dog RAIBO2 runs a marathon in 4:19 on a single charge

Engineers in South Korea built RAIBO2, a quadruped that completed the Sangju Dried Persimmon Marathon in 4 hours, 19 minutes and 52 seconds on one battery charge in 2024. It averaged 5.9 mph and posted a cost of transport of 0.25, beating the 0.37 of an average human runner.

• The 26.2-mile course took 4:19:52 at an average pace of 5.9 mph
• Its 2,016 Wh battery still had over a third of charge at the finish
• Cost of transport of 0.25 beat the 0.37 of an average human runner
• The route's 938 feet of elevation change was handled with a remote human operator