Hambridge Conservation Park
To the north of Lock is the large Hambridge Conservation Park which covers 37 847 ha and is notable for its mallee scrub and extensive sand dune system. The rainfall in the park is below 400mm and consequently much of the park is remarkably similar to the Big Desert district in the Mallee area of Victoria.
Hinck's Conservation Park
To the south of the town is Hinck's Conservation Park which covers 66 285 ha of largely inaccessible land which, again, is characterised by sand plains and dunes. It was dedicated in 1962 and is typical of the arid landforms which characterise much of the Eyre Peninsula.