Boxford has taken another step toward creating a trail link from Boston to New Hampshire as part of the state Department of Transportation’s Border to Boston Rail Trail. The Board of Selectmen recently reached an agreement with National Grid to allow the town to use a path owned by the utility as a pedestrian and bicycle trail. The land is a former railroad bed currently used for transmission lines. Under plans for this portion of the rail trail, a paved 16.7-linear-mile path will be created through Salisbury, Newbury, Georgetown, and Boxford to the Topsfield town line, where it will connect to another trail and continue on. Two sections of the Boxford path are on private land, said Town Administrator Alan Benson, and the town will need an agreement from those land owners to proceed to the next step, which will be to apply for a grant for the next phase of the project.