Fenway, commonly referred to as The Fenway, is a mostly one-way, one- to three-lane parkway that runs along the southern and eastern edges of the Back Bay Fens in the Fenway–Kenmore neighborhood of Boston, in the east-central part of the U.S. state of Massachusetts. As part of the Emerald Necklace park system mainly designed by Frederick Law Olmsted in the late 19th century, the Fenway, along with the Back Bay Fens and Park Drive, connects the Commonwealth Avenue Mall to the Riverway. For its entire length, the parkway travels along the Muddy River and is part of the Metropolitan Park System of Greater Boston.