Three hundred and eighty runners from 18 countries participated in last September 's inaugural marathon .
That number is expected to increase significantly for this year 's race , set for September 28 , as the competition 's profile continues to grow .
Three hundred and eighty runners from 18 countries participated in last September 's inaugural marathon , and that number is expected to increase significantly for this year 's race , set for September 28 , as the competition 's profile continues to grow .