The East Alligator River is a significant tidal estuary approximately 160 kilometers long, forming the boundary between Kakadu National Park and Arnhem Land in Australia's Northern Territory. It is a saltwater system with a substantial tidal range, and its character is defined by meandering courses, fertile banks, and a remote, wild setting. Paddling here is a remote wilderness experience with a strong cultural undercurrent, as the river is central to the Aboriginal cultural landscape. The primary and most prominent access point for paddlers is at Cahills Crossing, where a concrete causeway and an upstream boat ramp are located. This site also features multiple elevated viewing platforms and a picnic area, providing the only formal facilities in the area. The crossing itself is a major focal point, especially from July through October, when dozens of estuarine crocodiles congregate to feed on fish pushed over the causeway by large tides. This presents an extreme and constant hazard; standing near the water's edge, wading, or swimming is life-threatening. Paddlers must maintain a safe distance from the bank at all times. The tidal dynamics are critical for trip planning. Large tides push muddy water and baitfish upstream, creating strong currents. Rangers recommend checking tide times before any visit, as the best wildlife viewing coincides with the tide pushing in over the crossing. For a serene paddling experience, dawn or dusk are suitable times. The river is part of Kakadu National Park, so a park entry pass is required. Access to the Arnhem Land side of the river at Gunbalanya requires a separate permit from the Northern Land Council. The water reflects the changing skies, but can be muddy, especially on a pushing tide. The surrounding landscape includes rock art galleries like Ubirr, and cultural tours such as the Guluyambi Cultural Cruise operate on the river during the dry season.