Edao Weily, who won the annual Town and Gown Race, had trained with Running Across Borders which was established by an Oxford University graduate.
Mr Weily, 25, said he was “really happy to have won” his first competitive race in the UK.
About 3,000 runners took part in the event, raising up to £120,000 for Muscular Dystrophy research.
Malcolm Anderson set up a Running Across Borders training camp in Addis Ababa, Ethiopia, to provide economic opportunities for young runners from the region.
It is believed Mr Weily’s time of just under 30 minutes is a course record.