An easy trail right along the river.
For every continuous inch of rain fallen, the trails should be left to dry for 24 hours.
From the "Mayo Bridge" on 14th street, look for a paved path on the upstream side of the south end of the bridge. Follow this to a road that also intersects the flood wall. Take a left continuing under the I-95 bridge. As you are under the I-95 bridge, look for a trail to begin on the left. Follow this for a ways to a parking lot.
Fishermen/women frequent the area at Ancarrows Landing so keep your eyes open for children and others crossing the path.