Have never seen that kind of a feral cat at POR but have seen a bobcat (or lynx as they call it in Florida, I think) on our last visit (2010).
It was about 9:30 at night, on the sidewalk near Alligator Bayou, Bldg. 38. The cat was standing under a street lamp as I was pushing my 2 year old grandson along in a stroller. It was about 20 feet away from us. The cat was about the size of a small dog, maybe 20-25 lbs, with a clipped tail and pointy ears.
It took a good long look at us. Feeling uneasy, I stepped in front of my grandson. Then the cat slipped into the shrubbery. Since it stood there under the light, and eyeballed us for about 20 seconds or so, I got a good look at it.
When I reported the incident, the CM told me I was mistaken. My response was that my group must be mass hallucinating then, because several other members also saw this or another bobcat, near two different quiet pools on two different nights.
After that, it felt a bit creepy walking around the Alligator Bayou section at night, especially with the dim lighting and that tropical vegetation crowding the walkways in places.