Bool Lagoon is a seasonal freshwater wetland located in the Limestone Coast region of South Australia, approximately 24 kilometres south of Naracoorte and 311 kilometres south-east of Adelaide. Together with the adjacent Hacks Lagoon Conservation Park, it forms a Ramsar-listed wetland of international significance and is considered one of the largest and most diverse freshwater lagoon systems in southern Australia. The lagoons sit on the lands of the Meintangk and Boandik peoples.

As a seasonal wetland, Bool Lagoon receives most of its water during winter and spring and is frequently dry over the summer months — a natural and important part of its ecological cycle. Water levels are artificially managed by a regulating structure at the lagoon's outlet. This seasonal character means paddlers must time any visit carefully, as the lagoon may hold little or no water during summer and early autumn. The open water of Little Bool Lagoon, accessible via Bool Lagoon and Moyhall Roads, is noted as a particularly active area for waterbirds and may offer more reliable open water in suitable seasons.

The reserve is designated as a game reserve and is open for regulated duck hunting from late March through late June each year. During this period, firearms will be audible throughout the park, which is a material consideration for paddlers planning visits in those months.

The wetland supports over 150 bird species, including brolgas, Australasian bitterns, freckled ducks, pelicans, cormorants, herons, and various shorebirds and terns. It holds the highest recorded waterbird breeding diversity in the Limestone Coast region and at times supports around one third of the southern Australian brolga population for up to half a year. Southern bell frogs are also present within the reserve.

Facilities include a car park, picnic areas, barbecue facilities, public toilets, and a campsite with applicable fees. Vehicle entry is free. A 500-metre boardwalk extends over the wetlands. There is no dedicated paddling infrastructure, and given the shallow, seasonal, and ecologically sensitive nature of the lagoon, paddlers should contact the park directly to confirm water levels, access points, and any activity-specific restrictions before planning a trip.