Hamersley Inlet is a narrow, winding saltwater estuary located within the Fitzgerald River National Park in Western Australia. It stretches approximately seven kilometres from a sandbar at its ocean mouth to a rock bar at its northern end, carved through a deep valley of schist and quartzite rock. The inlet is notably deep for its size, averaging around two metres, which helps it retain water and creates a stable environment. The primary and only confirmed launch and take-out point for paddlers is the Hamersley Inlet picnic area and campground on the inlet's eastern shore, accessible via Hamersley Drive. This site offers parking, a picnic area, and a barbecue facility. The area is a peaceful natural setting with eucalypt woodlands and paperbark thickets fringing the water. Paddling here is a leisurely activity suitable for kayaks. The inlet is known for its significant wildlife, including large gatherings of black swans and other waterbirds, with the peaks of the Whoogarup Range overlooking the scene. The coastline presents significant coast and cliff risks, and paddlers should be aware that the adjacent park is subject to an ongoing Western Shield baiting program using 1080 poison baits lethal to humans, cats, and dogs; pets are not permitted. The presence of a sandbar at the ocean mouth indicates a dynamic interface with the Southern Ocean, suggesting that conditions at the entrance can be influenced by swell and tide. Paddlers exploring near the mouth should be cautious of potential surf and changing conditions. A walking trail links the picnic area to Hamersley Beach, and the broader area is part of the Hakea coastal walk trail network.