Martinez, Hesch, Cushing-Murray, Padilla take elite titles.
Americans are hoping to qualify for the U.S. Marathon Trials there.
The race's 34th edition is full of runners seeking Olympic-Trials-qualifying times.
All 50 U.S. states and 14 foreign countries will be represented.
Their prize was three liters of wine, a watch, and $500.
Solid elite fields will line up for Sunday's celebrity-laced race.