We didn't manage miles of walking, but we had 2 toddlers and a baby in tow. But we still enjoyed our walk and looking at the sculptures we passed. And the boys loved the big open space. They are too young still to really show much interest in what the park had to offer, but I can image in the future they would get more out of a visit there other than just running around.
Here are a few photos of our visit. See below for video of our trip.