George Patterson from the Morpeth Harriers says Serod Batochir who trains with the Northumberland running club is likely to finish in top 20 in the Men's marathon.
After 25 kilometers, the runner, also known as "Ziggy" was in 25th place in the race.
Batochir is representing his home country, Mongolia.
Morpeth Harrier Laura Weightman is just hours from the most important race of her career.
North Tyneside runner Ross Murray has qualified for the semi-final of the Men's 1500m event. His former running club saw him race.
Hexham rower Matt Wells failed to retire from international sport with a medal after the Great Britain Quad sculls team finished fifth