Think global, act local, working along a Waltham section of the Mass Central Rail Trail as part of National Trail Day. DCR and the Student Conservation Association will lead a variety of trail clearing and maintenace activities including lopping, chipping, raking, landscaping, and removing invasive species. There will be also an afternoon session between 2 - 4pm. Tools, instruction and water provided. Bring bottles. Wear long sleeves/pants and sneakers, not sandals.