Ted Robinson designed the original 18-hole course, which opened in 1969. Rees Jones oversaw a redesign and renovations in 1996 in preparation for the 1998 PGA Championship.
The fairways, on average, will be 26 yards wide. On either side of the fairways, a 6-foot-wide swath of intermediate rough running the length of each hole will be set to 1½ inches. Then, an 8-foot-wide band of first cut of primary rough will be grown to 2½ inches. The balance of the rough (secondary cut) will be 4 inches. Putting greens will be kept at 12 feet on the Stimpmeter.
The 2010 U.S. Senior Open is the first USGA championship to be conducted at Sahalee Country Club and the 22nd to be conducted in the state of Washington, which has hosted no prior U.S. Senior Opens.