1980 and 1988. Today's park Anstey Hill Recreation Park is a reserved area of public land with short seasonal creeks, low hills and steep-sided gullies. Its boundaries are largely formed by Lower North East, North East, Perseverance and Range Roads; there is a small section south of Lower North East Road. It lies at the edge of the Mount Lofty Ranges' foothills and forms part of the "hill's face" that is visible from Adelaide's metropolitan area. The park covers of the City of Tea Tree Gully, approximately northeast of Adelaide's central business district, with parts in the suburbs of Tea Tree Gully, Vista, Highbury and Houghton. The Adelaide–Mannum water supply pipeline crosses the park's south, and an associated filtration plant is sited on its southern boundary. Adjacent to the water filtration plant is Anstey Hill, reaching above mean sea level. The hill is shorter than a nearby unnamed peak. The park's southern boundary abuts the Anstey Hill Quarry, a producer of white clay, and two large disused quarries. Management of the park is influenced by the Department of Environment, Water and Natural Resources's long term biodiversity goals for the hill face zone and is also being managed in the broader context of a planning initiative known as Yurrebilla – The Greater Mount Lofty Parklands. The Department manages the park in association with local council and a volunteer group—The Friends of Anstey Hill. This volunteer group makes significant contributions to revegetation, weed control, ruin stabilisation and creation of walking trails. There are no visitor facilities or amenities except for walking trails, most of which follow fire access tracks; a single constructed pedestrian trail leads to Klopper's Quarry. The park is mostly designated as a "conservation zone" where only passive recreation, including walking dogs on leads, is permitted. Horses and motor vehicles are not allowed and only the main tracks are maintained. In recognition of the established and popular activity of mountain biking in the greater Adelaide area, and to better accommodate the mountain biking community in the north eastern suburbs, it was proposed in 2006 to permit cycling in designated zones on purpose-built tracks and on certain management tracks within the park. The intention is to satisfy both biodiversity and recreation objectives in the park and reducing the incidence of illegal mountain bike riding in other non-designated areas. Anstey Hill Park lies between Bureau of Meteorology measured rainfall contour lines that