The state and the city of Cambridge have purchased land parcels that make the final link for bicyclists and other recreation in the Watertown-Cambridge Greenway.

The development of the newly acquired segments will complete the state Department of Conservation and Recreation’s goal of creating a network of off-road recreational corridors between greater Boston and its western suburbs.

The recent $1.3 million purchase of B&M Rail Road land was completed with $829,000 of DCR land acquisition funds and $470,000 of federal funds for green transportation.

Additionally, the city of Cambridge has acquired land along a former B&M Rail Road corridor with $200,000 of community preservation funds, reserving a 14-foot wide trail easement for the greenway.

The new properties acquired will link the Charles River corridor, Fresh Pond Reservation and shopping center, Alewife Greenway and T station, the Minuteman Bike Path and the Mystic River Reservation. The first phase of the greenway, a one-mile segment, was completed in 2011.

The two new acquisitions have more than doubled the length of the original greenway, expanding it to 10,200 feet in length from 4,600 feet, and connecting it with many more miles of trail, according to a statement from the state.

"Once constructed, this link will add enormous recreational and green commuting opportunities in some of the most densely populated suburban and urban areas of Eastern Massachusetts," DCR Commissioner Ed Lambert said in the statement.

The Watertown-Cambridge Greenway is designed to provide an alternative route for cyclists and commuters traveling between the west and urban centers in Arlington, Cambridge and Boston. It also serves as a recreational greenway and passive park with native plantings and wildlife.