The Hillsborough River Estuary is a defining tidal system for the shoreline of Charlottetown, Prince Edward Island. This estuary incises deeply into the heart of the island, forming a lengthy expanse of salt marsh and a major tidal inlet that almost splits the county. As a coastal saltwater feature, paddlers must plan around its significant daily ebb and flow, which sculpts sandbars and influences currents throughout the system. The estuary is a central feature for paddling in the region, with trails like the Charlottetown Harbour Paddle and the Hillsborough River Path offering access points and routes along its shores. These trails provide pleasant views and relaxing access to the water. The shoreline is characterized by salt marshes, and the estuary's geography creates a lengthy, meandering watercourse ideal for exploration. Paddlers should be prepared for exposure to wind and fetch across open sections, and must be aware of tidal timing to manage currents effectively. The area is used for paddle sports, and the presence of a bike trail and other recreational paths along the shore suggests there are facilities and amenities for visitors in the vicinity.