Randers Fjord is a 30 km (19 mi) long Danish fjord in Northern Europe leading to the sea of Kattegat, between Denmark and Sweden. The fjord is the outlet from Denmark's longest river, Gudenaa. The upper 13 km (8.1 mi), starting at the town Randers, look more like a broad river than a fjord. The lower 17 km (11 mi) have extensive reed plains bordering the shores To some extent this inhibits the recreational use of and access to the fjord. In some places, the reed beds are harvested for traditional roof thatching.