Course
The river originates (67°52′10″N 120°13′16″W / 67.86944°N 120.22111°W / 67.86944; -120.22111 (Hornady River (head))) in the western Kitikmeot Region, Nunavut, 20 km (12 mi) south of Bluenose Lake (Takipaq). It initially flows west-southwest, passing into the Northwest Territories along the southern edge of the Melville Hills within the Settlement Region of the Inuvialuit, just south of the Tuktut Nogait National Park boundary. It then flows northwest through Tuktut Nogait, its canyons and waterfalls making it one of the main features of the park. The river empties into Amundsen Gulf's Darnley Bay, 14 km (8.7 mi) east of the Inuit hamlet of Paulatuk.
The Hornaday is approximately 190 mi (310 km) in length. Its main tributary is the Little Hornaday River northwest of the park. First Creek, Second Creek, Aklak Creek, George Creek, and Rummy Creek drain the Hornaday. Rummy Lake (69°07′31″N 123°30′08″W / 69.12528°N 123.50222°W / 69.12528; -123.50222 (Rummy Lake (Hornady River))), Seven Islands Lake (69°17′02″N 123°00′16″W / 69.28389°N 123.00444°W / 69.28389; -123.00444 (Seven Islands Lake (Hornady River))), and Hornaday Lake are part of the river's system. Hornaday River runs parallel with the Horton River to its west, and the Brock River to its east.
Located at an elevation of 274 m (899 ft) above sea level, La Roncière Falls (69°08′16″N 122°52′37″W / 69.13778°N 122.87694°W / 69.13778; -122.87694 (La Roncière Falls (Hornady River))) is a 23 m (75 ft) waterfall on the Hornaday, south of the main tributary. Its name was adopted by the Geographical Names Board of Canada in June 1952.
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