With six guys who have run under 2:05 (more than London), this field is impressively deep. Desisa is a slight favorite but '15 runner-up/Worlds silver medallist Yemane Tsegay, '15 3rd placer Wilson Chebet and Chicago runner-up Sammy Kitwara (2:04:28 pb) are among the many guys looking to take him down. What role, if any, will the meldonium ban play?

Tyler McCandless, Ian Burrell, and Sean Quigley lead the men's charge, while Jeannette Faber, Esther Erb, Meghan Peyton, and Brianne Nelson front the women's field.

Kogo will face Rebuen Limaa (60:52) and Shadrack Kosgei (61:52). 1:02:51 man Ian Burrell leads the Americans. US's Lindsey Scherf will challenge Mejdoub in the women's race.