Police drew their guns on the teen's Ford Escape after it hit the woman at the corner of Flinders and Elizabeth streets around 10.30am, about 150 metres from where tens of thousands of runners were taking part in the Melbourne Marathon. The SUV then struck several parked cars and street signs on Flinders Lane before the boy was arrested without incident at Albert Park.
Overnight, police charged him with ten offences, including reckless conduct endangering serious injury and failing to render assistance. The latter offence carries a penalty of up to ten years in prison.
Separately, runners reported safety concerns during the marathon. One runner claimed he and others were struck by pacing vehicles. The complaints add to questions about crowd and traffic management during large-scale events that involve road closures and high pedestrian volumes.
The teenager is scheduled to appear in court at a later date. The injured woman's condition has not been detailed by authorities.