The Aa Saint-Omer Golf Club's 9 Trous course is located in Acquin-Westbécourt in the Nord-Pas-de-Calais region of northern France, designed by Dutch architect Johan Frederik Dudok van Heel. The club sits in the valley of the Aa River, which gives the property its name and influences the landscape character of the layout. The region's relatively flat terrain and agricultural heritage provide the setting for this nine-hole design. Dudok van Heel, who worked on several courses in France and the Low Countries during the mid-to-late twentieth century, typically incorporated natural water features and strategic bunkering into his designs. The 9 Trous course serves as a shorter complement to the club's main eighteen-hole layout, offering golfers a more compact option while maintaining design coherence with the broader property. The routing takes advantage of the river valley's gentle contours and existing vegetation. The course functions both as a learning ground for developing players and as a quick-play option for members and visitors seeking a shorter round. Its position in northern France places it within reach of golfers from both French and Belgian population centers, and the club has developed a regional reputation as an accessible facility in an area where golf infrastructure is less dense than in other parts of France.