Three Rivers course was built upon the volcanic ashes of Mount St. Helen's. Water hazards (a lake and a creek) come into play on many holes throughout this wide-open design. The fairways are tree lined and the greens are medium in speed and size. The 6,700-yard championship tee also has a ladies' course rating of 76.7 and a slope of 127. The 6,115-yard men's tee also has ladies course rating of 73.6 and a slope of 120. The 5,773-yard men's tee also has a ladies' course rating of 72.2 and a slope of 117. The 5,419-yard ladies' tee also has men's course rating of 65.1 and a slope of 106.