There are two great golf courses at Marriott St. Pierre. The Old Course leads the way, having been proclaimed as one of the top golf courses in the world, and The Mathern Golf Course offers a shorter, but just as enjoyable alternative.
Mathern
18 holes, 68 par, 5748 yards. Parkland / Woodland.The Mathern Golf Course makes for a truly enjoyable round of golf. Although shorter than The Old Course it presents a challenge for players of all abilities. With a great parkland design The Mathern is perfect for a quick game before leaving the hotel or as a warm-up to the Marriott St Pierre's more challenging golf course.
Measuring in at 5,732 yards, Marriott St Pierre re-modelled the Mathern Course in 2007 to better its design and condition. Now it is playing beautifully with the location adding to the enjoyment, with superb views over the Welsh countryside to admire as you make your way round the golf course.
| Hole | White | Yellow | Par | SI | Ladies | Par | SI |
| 1 | 326 | 319 | 4 | 11 | 310 | 4 | 13 |
| 2 | 125 | 116 | 3 | 17 | 105 | 3 | 17 |
| 3 | 391 | 386 | 4 | 5 | 378 | 4 | 1 |
| 4 | 513 | 503 | 5 | 3 | 460 | 5 | 3 |
| 5 | 190 | 183 | 3 | 7 | 136 | 3 | 15 |
| 6 | 433 | 424 | 4 | 1 | 416 | 5 | 7 |
| 7 | 356 | 350 | 4 | 13 | 344 | 4 | 5 |
| 8 | 218 | 210 | 3 | 9 | 183 | 3 | 11 |
| 9 | 308 | 298 | 4 | 15 | 282 | 4 | 9 |
| Out | 2860 | 2789 | 34 | | 2614 | 35 | |
| 10 | 258 | 249 | 4 | 18 | 240 | 4 | 16 |
| 11 | 202 | 195 | 3 | 10 | 186 | 3 | 14 |
| 12 | 312 | 298 | 4 | 16 | 229 | 4 | 12 |
| 13 | 353 | 344 | 4 | 6 | 334 | 4 | 2 |
| 14 | 425 | 420 | 4 | 2 | 414 | 5 | 6 |
| 15 | 404 | 395 | 4 | 4 | 384 | 5 | 4 |
| 16 | 358 | 354 | 4 | 12 | 307 | 4 | 8 |
| 17 | 383 | 376 | 4 | 8 | 370 | 5 | 10 |
| 18 | 193 | 186 | 3 | 14 | 147 | 3 | 18 |
| In | 2888 | 2817 | 34 | | 2611 | 37 | |
| Total | 5748 | 5606 | 68 | | 5225 | 72 | |
The Old Course
18 holes, 2 par, 7028 yards. Parkland / Woodland.The Old Course is a 6,756 yard par 72 golf course at Marriott St Pierre and is renowned as being one of the top golf courses in the world. Host to numerous European Tournaments, the golf course boasts winners such as Greg Norman and Seve Ballesteros.
Having been re-modelled in 2008, the golf course has far improved drainage and numerous minor alterations making it more interesting and a new challenge to those who have played it before, making Marriott St Pierre a great choice for a golf break.
| Hole | White | Yellow | Par | SI | Ladies | Par | SI |
| 1 | 575 | 565 | 5 | 3 | 539 | 5 | 3 |
| 2 | 364 | 359 | 4 | 9 | 338 | 5 | 11 |
| 3 | 167 | 149 | 3 | 15 | 140 | 3 | 17 |
| 4 | 377 | 366 | 4 | 13 | 349 | 4 | 5 |
| 5 | 407 | 366 | 4 | 1 | 325 | 4 | 1 |
| 6 | 164 | 153 | 3 | 11 | 136 | 3 | 13 |
| 7 | 443 | 426 | 4 | 5 | 413 | 5 | 9 |
| 8 | 306 | 299 | 4 | 17 | 290 | 4 | 15 |
| 9 | 443 | 431 | 4 | 7 | 408 | 5 | 7 |
| Out | 3246 | 3114 | 35 | | 2938 | 38 | |
| 10 | 356 | 340 | 4 | 18 | 310 | 4 | 10 |
| 11 | 395 | 387 | 4 | 6 | 331 | 4 | 6 |
| 12 | 552 | 548 | 5 | 4 | 443 | 5 | 8 |
| 13 | 215 | 217 | 3 | 14 | 184 | 3 | 16 |
| 14 | 516 | 482 | 5 | 10 | 463 | 5 | 2 |
| 15 | 363 | 334 | 4 | 16 | 312 | 4 | 14 |
| 16 | 448 | 413 | 4 | 2 | 398 | 5 | 4 |
| 17 | 430 | 417 | 4 | 12 | 346 | 4 | 12 |
| 18 | 235 | 235 | 3 | 8 | 141 | 3 | 18 |
| In | 3510 | 3373 | 36 | | 2928 | 37 | |
| Total | 6756 | 6487 | 71 | | 5866 | 75 | |