Shalane Flanagan's inspiring victory for an American at the New York City was one of 2017's best marathon moments ... as was a gorilla in London

Shalane Flanagan, the Nike quest to beat a 2-hour marathon, a gorilla on the run in London and an unfortunate wardrobe malfunction are among the most memorable marathon moments of 2017. My story for ESPN.com's Endurance section: http://www.espn.com/sports/endurance/story/_/id/21837747/a-gorilla-london-marathon-other-top-race-moments-2017