The closest is 81st street with B(only weekdays)&C. Youbcan also take a bus from columbus circle. 4/5/6 to 77th st and 86th st with a few mins of walk can also get you there.
The park is near many subway stations. The 59th & 5th Ave N/R/W on the lower eastern corner of the park. Columbus Cirle trains on the lower western corner. The A/C trains along the westside and the 4/5/6 train is a few blocks east of the park.
Tons of dubeay bring you there.
Thanks! Your answer is awaiting moderation.