I have fished inside the park on Greenbriar fairly regularily since 1994. I have spent most of my time upstream of the picnic area. I have never heard of or even seen anyone catching a brown during these years on that stream. I suspect outside of the park, it's a possibility. I would be interested in hearing from someone who have caught a brown in the last 20 years or so on that stream. I'm afraid if they are there, it will be far and few between. I really is a stream with high gradient and cold water, inside the park. More than likely if there are browns they will be way down Pittman Ctr, and Richardson cove. Just my hypothesis.