Based on the reactions circulating on social media, Oakmont Country Club is poised to be the main star of the 2025 U.S. Open. Everything indicates that the course is set to be one of the toughest golf challenges in recent memory.The most recent reaction came from Michael Kim, an expert sharing his impressions through his X account, followed by more than 166,000 fans. In this case, the one-time PGA Tour winner reacted with a tongue-in-cheek Saturday Night Live GIF to a post by Golf Channel's Todd Lewis:"According to the @USGA the green speeds for the @usopengolf at Oakmont will be between 14' 5" and 14' 9" on the Stimpmeter. The primary rough is dense and uniformed at five inches," Lewis posted.There's no doubt these aren't very attractive conditions, hence Kim's lukewarm reaction. Lewis' report of the green speed means reading the trajectory and speed of putts will be difficult at Oakmont. Meanwhile, the height and thickness of the rough will easily cover a golf ball.Kim qualified for the 2025 U.S. Open thanks to reaching the 52nd spot on the world ranking. This will be his third appearance in the event, following his 17th-place finish at Merion in 2013 and missing the cut in Los Angeles in 2023.Players have also reported the challenging conditions expected at Oakmont. Recently, Ben Griffin, Rory McIlroy and Adam Scott said they played practice rounds and described the many challenges they faced on the course.Defending U.S. Open champion Bryson DeChambeau not only played a practice round but also filmed it and posted the video on his YouTube channel, which has more than 2 million subscribers. The video clearly shows the many difficulties competitors in the third major tournament of the season will face.Oakmont Country Club was founded in 1903, and its golf course was designed by Henry Fownes in 1904. The course currently measures 7,431 yards, is par 71, and boasts a course rating of 77.7 and a slope rating of 142.Johnny Miller set the course record of 63 at the 1973 US Open.Considered by many to be the world's hardest golf course, it has hosted numerous top-level events, including nine US Opens. The 2025 tournament will mark Oakmont's 10th hosting of the event, with the club scheduled to host again as early as 2033.More Golf: Keegan Bradley Offers Strong Opinion on First Ryder Cup Lock