Starting from the intersection of Wanna Road and the Pillie Hut Powerline Track, Lincoln National Park, this walk takes you to Sleaford Mere. This challenging bushwalk initially meanders through inland low mallee woodland, climbing to a vantage point with panoramic views over the park before reaching the Brian Clarke Hut, an excellent camp shelter for bushwalkers. From there, the walk continues over the massive, wind-sculpted sand dunes of the Sleaford-Wanna dune system, then follows the Sleaford Bay coastline towards Sleaford Mere, passing across pristine white sandy beaches and along rugged limestone cliffs, with breathtaking views of the exposed Southern Ocean. The walk is part of the Investigator Trail, a long-distance walking trail consisting of several shorter connected trails within Lincoln National Park. Sleaford Bay has exposed, hazardous waters with large waves and dangerous rips, and is popular for surfing but not safe for swimming. This walk consists of wide and narrow walking trails and fire tracks, with uneven natural surfaces, compacted natural surfaces, sandy surfaces and short steep hills, suitable for moderate fitness levels, and can be done in either direction. Let us begin by acknowledging the Traditional Custodians of the land on which we travel today, and pay our respects to their Elders past and present.