Alewife Brook Reservation is a Massachusetts state park and urban wild located in Cambridge, Arlington, and Somerville.

Common species include osprey, great blue heron and the woodcock, whose unusual mating ritual may sometimes be observed by visitors.

North of Broadway the area between the brook and the parkway opens, and has been developed to include playgrounds, playing fields, and Dilboy Stadium.

South of the Fitchburg Line is the small Blair Pond,[5] which has public access from Mooney Street and Normandy Ave.

By 1852, several spurs were serving local freight customers, including ice houses on the south side of Spy Pond.

A map from 1903[8][9] shows these railroads criss-crossing the reservation, as well as Alewife Brook proceeding farther south to drain Fresh Pond.

The reservation was originally planned by landscape designer Charles Eliot in conjunction with the Alewife Brook Parkway, although it has been substantially altered since its initial set-aside.

[6] Beginning in 2011, the City of Cambridge constructed a 3.4-acre storm water management wetland in the reservation, just west of Alewife Station.

[10] The wetland stores and gradually releases collected storm water runoff from nearby parts of Cambridge, including the Huron and Concord Avenue areas.

Before the plan was implemented, a series of court cases arose from public discourse in the community that deemed the project "an inappropriate use of parkland".