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.