Railroads rivers and ivy The Phenix-Harris River Walk is a hiking and biking path that was constructed along an old rail road bed. It follows the Pawtuxet River and eventually will be connected to other short hiking trails to form a much longer one. The walk is short and flat, probably only a little more than a half mile but hopefully one day will be much longer when it is connected to the other paths. It’s a pleasant little walk in the winter and is a decent place for some easy cross country skiing. It the spring and summer the bugs are quite bad and the path is infested with some very healthy poison ivy. You definitely have to be careful where you step. Certainly not the most exciting path but at least the Pawtuxet River does seem to be cleaner than it was a decade ago. Once the walk is connected to a few other paths in the area it will be an interesting walk along a river right in the middle of a congested and developed urban area.