Quintana's Movistar team lead the chase of the eight-strong leading pack, but with their numbers depleted could not return their team leader to the front.
Sumgong, who won the London Marathon this year, bided her time throughout the race, staying with the leading pack and opting not to move into the lead until the final stages.
5.24pm BST The leading pack drop a few shots.
The tension rose as the leading pack jostled for position.
Gavin Noble from Ireland, Javier Gomez and the Russians are all in the leading pack too.
On First Avenue, after she had dropped back, she started catching up with the leading pack.
Armstrong was in the leading pack Sunday, but his overall placing had yet to be determined.
Halfway through, when the leading pack was down to three, Kastor faded.
After 16 miles, the leading pack was down to four runners, all Kenyans.
And Mo Farah, the double Olympic champion and star of London 2012, was among the leading pack of elite runners.
At least twice she fell out of the leading pack because she was so intent on maintaining an even pace.
