You can follow the High Line north until it ends around West 34th street and 11th avenue. From here you will find another Citi Bike docking station located at the corner of 11th and 34th street. This is a pretty convenient location for you to hop back on the West Side highway bike path. From this location it will about another 10-15 minute ride north along the Hudson to the 59th Street docking station at West End (11th avenue) and 59th Street. This is a good location to dock the bike and walk to Columbus Circle. If you’d prefer to keep biking north to the Upper West Side there are a number of other docking stations along the Riverside Park.