The Lower Riverview Trail at Frick Park, Pittsburgh, PA, is a moderate 0.9 mile one-way hike that runs from the end of the Bench Trail all the way around the Riverview Trail and back down close to where parking is.
There are a couple of forks in the trail and the GPS data provided is slightly off. If you're traveling from north to south, when you arrive at the first fork, keep left. Go straight through the 2nd fork until you reach the 3rd fork. At the 3rd fork, go right, and then keep left to stay on the trail which will lead to the Iron Gate Trail.