Lake Boomanjin

Lake Boomanjin is the world's largest perched lake, located in the southern interior of K'gari (Fraser Island) within Great Sandy National Park, Fraser Coast Region, Queensland. Covering about 200 hectares, this shallow freshwater lake is notable for its reddish-brown tannin-stained water, white sandy shoreline and surrounding eucalypt and melaleuca forest. Formed by organic matter sealing sand depressions, it is a key natural feature of the UNESCO World Heritage-listed island.

Visitors can expect a large, shallow freshwater lake with distinctive tea-coloured water stained by tannins from surrounding vegetation, fringed by white sand and open eucalypt and melaleuca forest. The setting is remote and natural with no built development at the water's edge. Access is via sandy inland 4WD tracks to a small day-use area. Visitors can wade and swim in shallow water, walk along the sandy shore, photograph the contrasting colours and enjoy quiet bush surroundings.

Lake Boomanjin is a perched lake formed over thousands of years where decomposed vegetation created an impermeable layer over sand, allowing rainwater to perch above the regional water table. It is part of the Great Sandy National Park on K'gari, inscribed on the UNESCO World Heritage List in 1992 for its outstanding natural values including the world's largest sand island and its perched dune lake systems.

K'gari (Fraser Island) is the traditional land of the Butchulla people, who are the Traditional Owners. Perched lakes and waterways hold cultural significance and the island's natural features are central to Butchulla stories and connection to Country. Visitors are encouraged to respect cultural heritage and follow guidance from Traditional Owners and Queensland Parks and Wildlife Service.