Thanks to the work of a half-dozen student volunteers, residents and visitors now have a new, roughly 1-mile walking trail to traverse along the Essex County Greenbelt’s South Street Woodlot property. From July 29 to Aug. 2, six members of the Student Conservation Association Massachusetts, along with Greenbelt staff, completed the trail, which crosses four parcels on 30 acres of conserved land. The group cleared the trail and built three sections of boardwalk through wetlands, each ranging from 100 to 140 feet long. Greenbelt’s director of land stewardship, Dave Rimmer, who coordinated the project, said in a statement that a small parking area will be completed along South Street by the end of August. The Student Conservation Association’s Massachusetts chapter, in partnership with AmeriCorps and the Massachusetts Service Alliance, is in its 16th year. Its programming, which also involves the state Department of Conservation and Recreation, aims to teach youth about the environment and to complete high-priority conservation projects across the state, according to its website.