The Hawkesbury River in New South Wales, Australia, is a large tidal estuary located roughly one hour north of central Sydney by car. It is also accessible by train from Sydney or the Central Coast, with Hawkesbury River Station serving as a convenient entry point. The river is rated suitable for beginner paddlers, though tidal and wind conditions demand attention before any outing. Paddling with the tide rather than against it is strongly recommended, as adverse conditions can significantly increase the difficulty of what would otherwise be a straightforward trip.

There are numerous put-in points accessed through public land along the river. Key launch sites include the Parsley Bay Boat Ramp at Brooklyn, the Deerubbin Reserve ramp off the Pacific Highway (a large facility with a pontoon and ample parking), and Berowra Waters, which offers calm, protected water for those heading north toward camping areas. The Hawkesbury Nepean canoe trail runs 83.5 kilometres from Yarramundi to Wisemans Ferry and can be broken into six day sections or completed as a multiday expedition. Accommodation along this stretch includes caravan parks, water ski resorts, and B&Bs, with wild camping available in Cattai National Park on the Windsor-to-Ebenezer section.

From Brooklyn, popular day routes include a circuit via Mullet Creek through Brooklyn Harbour (accessed from Deerubbin Reserve), and a return paddle to Patonga covering approximately 19 kilometres round trip. Cowan Creek, reached from Brooklyn, offers clear water, dense bushland, Aboriginal rock art, sandstone cliffs, and secluded beaches. Dangar Island is reachable in around 20 minutes from Parsley Bay, while Jerusalem Bay takes approximately 1.5 hours and Cottage Point 2 to 3 hours. Landing on Lion Island is not permitted.

The river sees significant powerboat and water-ski traffic, and paddlers are advised to travel on the right-hand side of the river and remain alert to vessel wash. The lower reaches near the coast can become lumpy depending on swell, wind, and tidal conditions, so checking a marine chart and weather forecast before departure is important. The surrounding landscape features sandstone cliffs, lush bushland, and abundant wildlife. Remote camping areas north of Brooklyn are accessible within 3 to 4 hours of paddling, with basic toilet facilities at most sites; drinking water is only available at Crosslands Reserve.