Central Park offers plenty of hills for runners to sharpen their skills.

Bring some money when you run in Central Park in case you need to stop at one of the many vendors' stands to get water.

Central Park's Jacqueline Kennedy Onassis Reservoir offers a scenic running trail.

A woman runs North on Central Park's trail on the Upper East Side, heading toward Museum Mile.

A runner hits the path near Central Park's East 72nd Street entrance. Always bring money or your Metrocard when running in New York City so you can hop on a train to get back.

A 1.5-mile path circles the Jacqueline Kennedy Onassis Reservoir in Central Park.

The running path around the Jacqueline Kennedy Onassis Reservoir offers an ideal running surface of packed dirt.

You can access the East 90th Street and 5th Avenue entrance of Central Park from buses or cabs on 5th Avenue, or take the Subway from the 86th Street-Lexington Avenue station.

The Jacqueline Kennedy Onassis Reservoir path offers plenty of shade for respite on hot days.