Mary Slaney is an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 former track athlete

Track and field

Track and field is a sport comprising various competitive athletic contests based around the activities of running, jumping and throwing. The name of the sport derives from the venue for the competitions: a stadium which features an oval running track surrounding a grassy area...

. During her career, she won gold medal

Gold medal

A gold medal is typically the medal awarded for highest achievement in a non-military field. Its name derives from the use of at least a fraction of gold in form of plating or alloying in its manufacture...

s in the 1500 meters

1500 metres

The 1,500-metre run is the premier middle distance track event.Aerobic endurance is the biggest factor contributing to success in the 1500 metres but the athlete also requires significant sprint speed.In modern times, the 1,500-metre run has been run at a pace faster than the average person could...

 and 3000 meters

3000 metres

The 3000 metres is a popular amateur middle distance track event where 7.5 laps are completed around a 400 metre track. This event is generally classified as middle distance, but it could be classed as a long distance event in many high schools, since they do not promote races such as the 5000 and...

 at the 1983 World Championships

1983 World Championships in Athletics

The inaugural World Championships in Athletics were run under the auspices of the International Association of Athletics Federations and were held at the Olympic Stadium in Helsinki, Finland between August 7 and August 14, 1983....

, and set 17 official and unofficial world records and 36 US national records.
Mary Decker was born in Bunnvale, Hunterdon County

Hunterdon County, New Jersey

Hunterdon County is a county located in the western section of the U.S. state of New Jersey. As of the 2010 United States Census, the population was 128,349. It is part of the New York Metropolitan Area. Its county seat is Flemington....

, New Jersey

New Jersey

New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...

. A decade later her family moved to Southern California

Southern California

Southern California is a megaregion, or megapolitan area, in the southern area of the U.S. state of California. Large urban areas include Greater Los Angeles and Greater San Diego. The urban area stretches along the coast from Ventura through the Southland and Inland Empire to San Diego...

, where Decker started running. A year later, aged 11, she won her first local competition.

She joined her school athletics club and a local track club, and completely immersed herself in running, for which she would pay an injury-laden price later in her career.