 The summit is just outside the Crawford Notch State Park; it is at the northeast corner of the Pemigewasset Wilderness.The north and east faces of Mount Willey drain directly into the Saco River, thence into the Gulf of Maine at Saco, Maine.The south and west sides drain into the North Fork of the Pemigewasset River, thence into the East Branch, the Pemigewasset River, Merrimack River, and into the Gulf of Maine at Newburyport, Massachusetts.