The Hadley Hills surround the village of Hadley; The highest points and most prominent outcroppings are: Pinnacle Point, at 1,262 feet (385 m), Kerr (Cemetery) Hill, at 1,258 feet (383 m), both located in Hadley Township, Mt. Christie, at 1,251 feet (381 m), in Metamora Township, and a point near Mayville, reaching up to 1,050 feet (320 m) above sea level. Located predominately in Hadley Township, in Lapeer County, the Hadley Hills are actually an extension of a much larger collection of hills which are attributed to other geologically related moraines, that run in a southwesterly direction from northern Lapeer County and stretch as far south as northern Indiana, and Ohio. The southern portion of this moraine system is known collectively as the Irish Hills. This glacial ridge, and plateau system, creates some of the highest points in southern lower Michigan, is dotted by numerous lakes, and provides the Detroit Metropolitan Area with many of its recreational areas, parks, ski resorts, and beaches, including the Ortonville Recreation Area, Metamora-Hadley Recreation Area, the Holly State Recreation Area, and the Mt. Holly, and Pine Knob ski areas.