I got this news today, looks like a fun ride. Neponset River Greenway Spring Ride: March 22nd 2008

This ride follows Truman Parkway north along the Neponset River, then cuts through Milton along the river to Dorchester Lower Mills, where we’ll cross the river and bike through Olmsted-designed Dorchester Park. We’ll follow John Adams’ commuting route, turning off it to go over Ashmont Hill to Boston Harbor. After stops at Victory Road Park and Phillips’ Candies, we’ll follow the Neponset Trail back to Milton and ride a bit of the Boston side of the river to Hyde Park, where we will cross back to Truman Parkway and return to the start.Click here for more details