Question: What is the name of a protected area located in the Adelaide Hills, South Australia which conserves a significant area of natural bushland and which forms a boundary to the east of Waterfall Gully near the foothills of the Mount Lofty Ranges?

Context paragraphs:
Mount Lofty Ranges zone (wine): Mount Lofty Ranges zone is a wine zone located in central South Australia west of the Murray River that occupies the Adelaide metropolitan area north of Glenelg, extending as far north as Crystal Brook, and as far south as Mount Compass in the Mount Lofty Ranges.  The zone which encloses the Barossa zone on three sides, consists of the following wine regions all of which have received appellation as an Australian Geographical Indication (AGI): Adelaide Hills, Adelaide Plains and Clare Valley.  The zone received AGI in 1996.

Waterfall Gully, South Australia: Waterfall Gully is an eastern suburb of the South Australian capital city of Adelaide.  It is located in the foothills of the Mount Lofty Ranges around 5 km east-south-east of the Adelaide city centre.  For the most part, the suburb encompasses one long gully with First Creek at its centre and Waterfall Gully Road running adjacent to the creek.  At the southern end of the gully is First Falls, the waterfall for which the suburb was named.  Part of the City of Burnside, Waterfall Gully is bounded to the north by the suburb of Burnside, from the north-east to south-east by Cleland Conservation Park (part of the suburb of Cleland), to the south by Crafers West, and to the west by Leawood Gardens and Mount Osmond.

Para Wirra Conservation Park: Para Wirra Conservation Park (formerly Para Wirra Recreation Park) is a 1417 ha protected area located in the foothills of the Mount Lofty Ranges in the northern end of the Adelaide metropolitan area in South Australia.  The conservation park is part of a larger, 2573 ha block of contiguous native vegetation, the remainder of which is owned by PIRSA Forestry, SA Water and private landholders.

Geology of South Australia: South Australia is an Australian state, situated in the southern central part of the country, and featuring some low-lying mountain ranges, the most significant being the Mount Lofty Ranges, which extend into the state's capital city, Adelaide, which comprises most of the state's population.  Adelaide is situated on the eastern shores of Gulf St Vincent, on the Adelaide Plains, north of the Fleurieu Peninsula, between Gulf St Vincent and the low-lying Mount Lofty Ranges.  The state of South Australia, which stretches along the coast of the continent and has boundaries with every other state in Australia, with the exception of the Australian Capital Territory and Tasmania.  The Western Australia border has a history with South Australia, involving the South Australian Government Astronomer, Dodwell and the Western Australian Government Astronomer, Curlewis in the 1920s to mark the border on the ground.

Totness Recreation Park: Totness Recreation Park, is a protected area located in South Australia within the localities of Mount Barker and Totness in the central Mount Lofty Ranges.  Covering 41 ha of land, the park is divided by the South Eastern Freeway and features a large dam.  It was declared as a reserve in 1970 and re-designated as a recreation park in 1972.  The park has no visitor facilities except for access tracks.  It is the only park in the district, managed by the Department of Environment, Water and Natural Resources, that is solely designated for recreation.

Anstey Hill Recreation Park: Anstey Hill Recreation Park is a 362 ha protected area established in 1989 and located approximately 19 km northeast of Adelaide, South Australia.  The park is a significant reserve of bushland in the foothills of the Mount Lofty Ranges and is home to rare or vulnerable native plants and animals, and problematic invasive species.  It is managed by the City of Tea Tree Gully, the Department of Environment, Water and Natural Resources and a volunteer group—The Friends of Anstey Hill.  The park is designed for recreational walking and has no visitor facilities.  It is managed in association with the regional planning initiative known as of Yurrebilla, the Greater Mount Lofty Parklands.

Cleland Conservation Park: Cleland Conservation Park is a protected area located in the Adelaide Hills, South Australia about 22 km south-east of the Adelaide city centre.  Cleland Conservation Park conserves a significant area of natural bushland on the Adelaide Hills face and includes the internationally popular "Cleland Wildlife Park" and the popular tourist destinations of Mount Lofty summit and Waterfall Gully.  It is maintained by the South Australian Department of Environment, Water and Natural Resources (DEWNR).

Piccadilly Valley wine sub-region: Piccadilly Valley wine sub-region is a wine sub-region in South Australia located between the town of Summertown in the north and the towns of Stirling and Aldgate to its south in the Mount Lofty Ranges to the east of the Adelaide city centre.  The sub-region received appellation as an Australian Geographical Indication (AGI) on 14 April 2000.  The sub-region is part of the Adelaide Hills wine region and the Mount Lofty Ranges zone.

Lenswood wine sub-region: Lenswood wine sub-region is a wine sub-region located around the town of Lenswood in South Australia within the Mount Lofty Ranges to the east of the Adelaide city centre.  The sub-region received appellation as an Australian Geographical Indication (AGI) on 16 October 1998.  The sub-region is part of the Adelaide Hills wine region and the Mount Lofty Ranges zone.

Greenhill, South Australia: Greenhill is a suburb of Adelaide located about 9.3 km east of the city centre in the foothills of the Adelaide Hills.  Its boundaries were created in October 2001 in respect of the “long established name” with some land being moved into the adjoining suburb of Waterfall Gully in July 2002.  The suburb includes Greenhill Recreation Park and the western slopes of Mount Lofty.  Greenhill Creek flows through Waterfall Gully and feeds into First Creek.

Supporting paragraphs: Waterfall Gully, South Australia Cleland Conservation Park
Answer: Cleland Conservation Park