My wife and I went for a hike today at a beautiful piece of land overseen by the Nature Conservancy. Burnham Brook Preserve is a chunk of land (~1122 acres) that "protects the watersheds of Burnham Brook, Strong Brook, and the Eightmile River". While it is a great place to hike, no fishing is allowed, probably because "Burnham Brook Preserve protects a classic Atlantic salmon habitat in nearly pristine condition". We hiked right along Burnham Brook (pictures below). The stream is small and mostly shallow, although I did see some very nice pools. Maybe it's the Eightmile River that is being referred to as pristine salmon habitat.