The Irish Course has the same manufactured dunescape found on its more famous sister Straits Course, but with three major differences. The fairways are bentgrass, not fescue. Carts are allowed, although confined to cart paths. (It's walking only on the Straits, though both 18s are relatively easy to walk.) And the Irish has the only blind par 3 found at Whistling Straits, the 13th playing 183 yards over sand hills to a huge green ringed by more than a dozen bunkers. It doesn't get more Irish than that.