 Note that the boundary as implemented excludes the Appalachian Trail and the summits it passes over as well as Mount Carrigain.The East Branch of the Pemigewasset drains the eastern lobe through a number of small streams.Mounts Hancock and Carrigain are drained by Crystal, Carrigain, and Notch Brooks, while the center drains to the North Fork of the Pemigewasset and Shoal Pond Brook.