Download coordinates as: Lyndhurst is a rural locality in the Shire of Etheridge, Queensland, Australia.

[3] The Einasleigh River has a catchment area of 24,366 square kilometres (9,408 sq mi).

[14] Following its confluence with the Gilbert River, they spill into a vast estuarine delta approximately 100 kilometres (62 mi) wide[15] that largely consists of tidal flats and mangrove swamps across the Gulf Country.

[3] Blackbraes National Park is in the south of the locality with a small extension into neighbouring Porcupine.

[3] The Kennedy Developmental Road enters the locality from north-west (Conjuboy) and exits to south-west (Porcupine).