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Stone Farm Rocks are a series of Tunbridge Wells sandstone crags and a Site of Special Scientific Interest (under the name Stone Hill Rocks) in the county of West Sussex. The site consists of 8 metres high sandstone crags. The crags reveal sedimentary structures which are used to examine the deposition of minerals in relation to water depths, direction and strength.
The site is owned by the British Mountaineering Council who run it for the benefit of climbers. There are 74 identified climbs on the rocks. Bolt belays have been installed at the top of many of the climbs to reduce erosion of the site.

Tunbridge Wells sandstone is Lower Cretaceous in age. It was lain down in large braided river channels. Today it's outcrops form upland regions across the Weald of Kent. In the Tunbridge Wells area there are several locally famous sites. Mount Edgecumbe Rocks TQ5739 : Edgecumbe Rocks, Wellington Rocks TQ5739 : Wellington Rocks, Tunbridge Wells Common, Toad Rock TQ5639 : Toad Rock, Rusthall, Happy Valley Rocks TQ5639 : Happy Valley Rocks, High Rocks TQ5638 : High Rocks, Eridge Rocks TQ5535 : Eridge Rocks, The Chiddingstone TQ5045 : The Chiding stone, Chiddingstone, Harrison Rocks
The rock makes for good rock climbing in the SE of England.
The rock is locally rich in Iron and mining it gave the Wealden area an Iron making industry in Mediaevil times. It also accounts for a number of Chalybeate springs across Kent and Sussex.