Others saw him on or near the trail, too. Nothing new about that, really.
A witness was walking their dog, and turned around at the bridge/end of the trail, and there was BG coming down the trail. I don't have a link It's been over two years, now, a lot of links for MSM reports about the case are now dead ends.
The witness said they passed BG, then passed A&L but didn't exchange any dialogue with the girls.
There were many people there that day, at various times. Describing when the girls were dropped off, Libby's sister has mentioned that there were "lots of kids" there, or something to that extent. So I'd imagine there were quite a few witnesses who saw BG, in that general area, whether up close or at a distance.
JMO
-FD