Riverside Park is a small DCR property located mostly in Weston, between the Riverside MBTA station and the Martin Golf Course. For many years, the two pedestrian bridges that crossed the Charles from the park into Newton were closed due to their unsafe condition.
May 2012 Update
The conversion of the railroad bridge from Newton Lower Falls to Wellesley for pedestrian use was completed in Spring 2012. The opening ceremony was on May 8th.
Newton Tab article
the original proposal
more about the Blue Heron Trail