A bird hide and boardwalk enable you to wander through the unique wetlands fringing this biodiversity hotspot.
Lake Muir Observatory is a popular rest stop for travellers on the Muirs Highway. Overlooking Lake Muir, facilities include a 110m boardwalk, observatory, shelter, picnic tables, interpretive information and toilet.
It is an approx 2 hour detour but if you have the time, it's a beautiful spot to visit. Or if you are going through the South West this is easily accesible along the way.
Lake Muir is a freshwater lake, with a larger surrounding wetlands area, that is located in the South West region of Western Australia. The lake lies near Muirs Highway, north of Walpole and southeast of Manjimup. The lake has a surface area of 46 square kilometres (18 sq mi).
Lake Muir and its surrounding wetland lies within the Lake Muir-Unicup System, a 694 square kilometres (268 sq mi) area of internal drainage containing a complex of wetland systems. Lake Muir may, in flood, overflow southwest into the Deep River catchment (and possibly also southeast into the Frankland River via Poorginup Gully).
Lake Muir is usually brackish at the end of winter, saline by summer and dry throughout autumn.
A 14-square-kilometre (5.4 sq mi) section of wetland around Lake Muir has been identified by BirdLife International as an Important Bird Area (IBA) because it provides habitat for 10 or more pairs of endangered Australasian bitterns. The wetlands within the IBA are shallow with extensive beds of dense sedgeland and fringing stands of shrubland and woodland. Lake Muir has been excluded from the IBA as it is unsuitable for bitterns but it has supported large numbers of Australian Shelduck and may prove to be globally significant for that species.
Lake Muir was named after brothers Thomas and John Muir, the first European settlers in the Warren district, who settled at Deeside, 25 kilometres (16 mi) west of the lake, in 1852 and built a rush hut there in 1856
Historically the area was a Game Reserve, with a duck shooting season. The Department of Environment and Conservation (CALM) started monitoring the wetlands system in 1980 in order to manage the duck shooting.
On 5 January 2001 a 106 square kilometres (41 sq mi) area was designated, under the Ramsar Convention as Ramsar site 1050, a wetland of international importance, acknowledging its rich ecological diversity.