Was here recently with my family. One of the things that I love about being a Cleveland resident is that you always have something to do. Where are you? You are never more than 5 minutes from the entrance to a beautiful green space right inside the city, and this particular space has it all: hiking trails, a nature center that the kids adore, golf, sports fields, playgrounds, horseback riding trails, etc. There are these amazing stairs on the trail behind the nature center that are great for fitness, but also provide a lovely view of the River from about 150-200 feet up.
As a bonus, you can drive the lovely Valley Parkway (we always try to bet on how many cars we will pass going in the opposite direction driving up or down the valley road), which empties easily onto Lorain Ave. about 1 mile from the East Coast Custard location near Fairview Hospital. If you pack a lunch, you could make a whole day of this!