I went there for the first time after the golf course construction was completed, and it was more uncomfortable than before and the management was just so-so. The golf watch doesn't work on some holes, which is very inconvenient. How about adding more distance markers or markings? In particular, some golf courses would probably have a hard time operating without Korean golfers… However, customer service has not changed. It seems that the number of people visiting golf courses is decreasing. The fear of complaining about the loud road noise is for beginners… I am concentrating and can't hear any noise?? The location is relatively good, so I would like to visit again.

Reopened course. Everything is still in new condition. New bunker sand, fairway&green grass. Expecting the condition to improve in a few weeks. The freeway noise might be a bit annoying to you. Wide fairway and big green. It's great overall!

Finally, I had the opportunity to play at this new renovated course that I have driven by for years since I saw the renovation from the 57 freeway. The course is very layout. The green is way too firm packed with sand. No bounce or divot can be made. This course is not updated on my garmin watch, so I was just playing blind. The pace as you expect on the weekend is slow mo. I will come back on weekdays to play again, but this time with my laser range finder.

This course has reached new lows with its greed-driven approach to scheduling. Tee times are packed so tightly that it’s not just inconvenient—it’s infuriating. They’ve clearly decided that cramming in as many golfers as possible is more important than providing a decent experience. Charging for 18 holes while knowing players will not complete the round due to overbooking could be seen as fraudulent. This practice misrepresents the service provided and undermines consumer trust by failing to deliver the full experience that was promised and paid for.

Diamond Bar GC with a big return. The course is in great condition and the certain hole changes have been done nice to speed up the game here. Greens are rolling and holding. The fairways are running nice. Ciara and Brandon in the restaurant area keeping us going with the Patron and beers. Thank you!