Park Drive is a mostly one-way, two-lane parkway in the Fenway-Kenmore neighborhood of Boston that runs along the northern and western edges of the Back Bay Fens before ending at Mountfort Street.

As part of the Emerald Necklace park system mainly designed by Frederick Law Olmsted in the late 19th century, Park Drive, along with the Back Bay Fens and the Fenway, connects the Commonwealth Avenue Mall and Boylston Street to Beacon Street and the Riverway.

[2][3] Park Drive runs alongside the Muddy River from its beginning at Boylston Street to its intersection with Brookline Avenue.

[2] The Fenway, which is located on the other side of the Back Bay Fens,[2] allows for continuous travel in the opposite direction of Park Drive.

Olmsted felt that all of the submitted plans were subpar and either did not take into account flood control or focused too much on it and neglected the public park aspect.

He directed the Fens to be dredged, graded, planted, and turned into a seemingly natural salt marsh to absorb and clean the flowing waters.