In Union County, Pennsylvania just west of the town of Mifflinburg, there is a thirteen-mile Class A Wild Brook Trout Stream known as North Branch Buffalo Creek. The Pennsylvania Fish & Boat Commission designates North Branch Buffalo Creek as a Wilderness Trout Stream. This means that humans have not encroached upon the stream and it provides the fisherman a true wilderness experience. The stream is referred to as providing Exceptional Value. This spring fed creek is a tributary to Centre County’s Buffalo Creek.