The Big Flat Brook is the jewel of New Jersey trout water — a clear freestone running down through the Delaware Water Gap country in Sussex County, with the Blewett Tract set aside as fly-fishing-only and managed for a quality experience. It holds stocked browns and rainbows and a scattering of wild fish, with proper hatches and the kind of pretty pocket-and-pool water that makes you forget you're an hour from the New York line. It's a true freestone, so it runs cold and full in spring and thins and warms by midsummer; fish it in the good water of spring and fall and tread lightly through the catch-and-release stretch.
- Mixed sedimentary
