Take the Grand Central Pkwy over the RFK Triboro Bridge. Take the Randall's Island exit.

Head for the main parking lot which is located on Central Road.

Once you exit off the RFK Bridge for Randall's Isle... just follow the main road. Do not veer off where it says "Manhattan only". Just stay straight and follow the signs for the John McEnroe-Sportime Tennis Center.

The parking lot sits between Icahn Stadium on one side and the Tennis facility on the other.

If you have a gps unit.... you can enter the address "One Randall's Island, New York, NY 10035"