The NNRs on the East Hampshire Downs comprise Butser Hill, near Petersfield, a large area of chalk grassland on the highest point in the South Downs (a large area is also designated as a scheduled monument reflecting its historical significance, particularly in the Bronze and Iron Ages); Old Winchester Hill, a lowland grassland on the west and south facing scarp slopes of the Meon valley; and Beacon Hill, a high quality chalk grassland 5 km west of Old Winchester Hill.