Blying Sound is the outer reach of Resurrection Bay, a major fjord on the Kenai Peninsula in Alaska. It is also referred to as Harding Gateway, specifically denoting the passage between Rugged and Cheval Islands. This is a large, open saltwater sound connected to the Gulf of Alaska, characterized by significant depth, with Resurrection Bay reaching a maximum depth of 972 feet. The primary access point for paddlers is the city of Seward, located at the head of Resurrection Bay. From Seward, paddlers can launch to explore the sound and its many deep coves, such as Thumb Cove and Humpy Cove. Lowell Point, south of Seward, offers beach access and is a trailhead for the coastal route to Caines Head State Recreation Area, though parts of that trail are only passable at low tide. The water remains ice-free year-round, allowing for navigation in all seasons. Paddling here is defined by exposure to the open Gulf of Alaska, leading to potentially strong winds, large fetch, and significant ocean swell. The sound is a major corridor for boat traffic, including tour vessels, water taxis, and fishing boats accessing Kenai Fjords National Park, requiring constant vigilance. A specific hazard is a designated U.S. Air Force danger zone within Blying Sound used for intermittent air-to-air gunnery practice; public notice is given prior to these activities. The scenery is dramatic, with views of the Kenai Mountains and glaciers. Wildlife sightings are common and can include humpback whales, orcas, sea otters, Dall's porpoises, sea lions, puffins, and bald eagles. The historical Fort McGilvray is situated atop Caines Head. Water taxis from operators in Seward, such as Miller's Landing, are available to transport paddlers and gear to remote areas like Aialik Bay or to park cabins, enabling multi-day expeditions.