I had one! Although it's long and pretty anticlimactic. Let's start with some context. I was working at a summer camp, it's pretty old and historic, also by a touristy river but that's not typically an issue. A few ghost claims in the past, but the only real "haunting" is sort of a running joke since everyone calls her the nice ghost that shuts doors and cuts off lights. The "mean" ghost on the site is really only perpetuated by one person.
Anyhow, this camp is covered in pea gravel which is really loud to walk on if you don't know what you're doing and going slow.
It was about 9 PM, I was doing some evening odd jobs about 1/5th of a mile across camp from where everyone else was at an evening worship service, EVERYONE is there.
I begin walking towards everyone else and I see an adult man, couldn't make out any real features except for a dim dark green shirt walking on a path away from me towards the bathroom/shower house. No big deal, probably a counselor showering before the campers are done while the other counselor watches the kids (one of 1000 reasons for the 2 counselor per cabin rule the camp has). I probably would have reported it, but I was away from my walkie, don't remember the context of why.
Anyhow, I continue walking the same direction and see him a second time just in time to walk behind that same shower house a few seconds later. He covered maybe 400 feet in 10-15 seconds. I thought, holy crap that was fast, but his footsteps were silent (on pea gravel mind you).
This time I decide to investigate. I walk behind that shower house and see nothing out of the ordinary. From this position I can see all of the kids still at the service and walk in their direction. My boss was there anyways, I'll report it to him after the service. I look into the woods about 200 feet away and see the man once again, walking TOWARDS me (in other words, to be in that position he would have had to walk past that point, turn around and walk back my direction). But he's pretty far back and quickly disappears behind trees.
I grab the flashlight on my phone and shoot it back in that direction, nothing I can see. In all of these incidences I felt no fear, no discomfort, no cold chill. No signs of an encounter you typically hear of.
I report it to my boss a few minutes later and his son reported a similar story a while back of a man walking on the same path as my first sighting (this hasn't been a recurring ghost sighting location).