Join the 14th Annual Charles River Earth Day Cleanup! Volunteers will be joining an effort of approximately 3,000 volunteers to pick up trash along the Charles River. Organized by the Charles River Watershed Association and other nonprofits. 9am-12pm, April 20th, 2013.
Multiple celebrations afterwards, including one at the Hatch Shell. For more information and to get involved: http://www.crwa.org/cleanup.html