It's a wide, flat paved path, about a mile and a half total. You can see the whole loop from almost anywhere on it. There is one corner that goes behind a public works building where you might lose sight of someone briefly but that's about it. It certainly is possible someone could get lost from the trail, but it's not very likely as there's little concealment on the trail itself.
However, there are some woods on the outside of the loop, some of them dense and swampy. There's an old structure of some sort behind the public works building, fenced off. I posted a photo upthread of the woods. They are swampy and creeks run through as well. IMO, it would be possible for a small child to get lost in there, but to remain lost for this long seems less likely. If there are holes or deep areas in the swamp, it would be more possible for sure.
