Walker Flat Boat Ramp Reserve, also known as Swamp Hen Reserve, is a free overnight camping area on the western bank of the Murray River in South Australia.

The site offers a large bitumen parking area well suited to trailers and rigs of any size, plus a supplementary gravel verge for additional vehicles.

A boat ramp provides direct river access, and the backdrop of massive ochre-coloured cliffs adds to the scenic appeal. Facilities on site include covered picnic tables and a BBQ.

Shade is limited across much of the reserve, though spots to the left of the boat ramp offer some relief from the sun. The area is spacious and pet friendly, and there is no charge to stay.

Visitors are encouraged to keep the site clean and to support the nearby Walker Flat General Store.