The Valley course at Royal Portrush Golf Club was designed by Harry Colt and opened in 1932, providing a complement to the club's championship Dunluce Links. Colt routed the layout across lower-lying terrain adjacent to the more dramatic duneland occupied by the Dunluce, working with gentler contours and a different character of ground. The course takes its name from its setting in a valley that runs between the main dune ridges and the town of Portrush. The routing measures just over 6,300 yards from the back tees and plays as a par 70. While it lacks the severe elevation changes and towering dunes of its more famous neighbor, the Valley presents its own strategic interest through Colt's use of the available land forms, bunkering schemes, and green complexes. The course occupies a mix of linksland and parkland characteristics, with some holes playing through more sheltered, vegetated areas and others exposed to coastal winds. Several holes offer views across to the Dunluce routing and out toward the Atlantic. Royal Portrush members use the Valley course regularly for everyday play, particularly when the Dunluce hosts competitions or when weather conditions make the championship links especially demanding. The Valley serves as a testing but more approachable layout that reflects Colt's design principles on a less dramatic canvas. It provides a second eighteen holes at a club known primarily for hosting the Open Championship, most recently in 2019.