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

The reserve features a broad bitumen parking area well suited to trailers and larger rigs, along with a gravel verge for additional parking space, making it accessible for a wide range of vehicle and rig sizes.

Shade across the site is limited, though campers who position themselves to the left of the boat ramp can find some relief. The reserve is pet friendly and sits alongside the scenic Murray River, appealing to anglers, boaters, and nature enthusiasts alike.

Nearby Hettner Landing offers an alternative free camp for those exploring this stretch of the river.