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As part of planned freeway improvements to the SR-57/SR-60 Confluence Project, the Diamond Bar Golf Course will be closed for 17 months beginning September 1, 2021. During this closure, several renovations will be made to the course and facilities, improving the overall operations and golfing experience when the golf course reopens in early 2023. Please note that all golf course facilities will be closed during these renovations, including the pro shop, practice facility, banquet facility and café. Future golf tournament and banquet information/reservations may be acquired by calling (909) 861-8282.

For Construction and Project Updates:

  • Text 5760project to 22828

  • Phone: (866) 995-5760

  • E-mail:

  • Facebook/Instagram/WeChat/KakaoTalk: @5760Project


Six course holes located along the SR-57/SR-60 frontage and Grand Avenue will be reconfigured to allow for improvements to ramps at Grand Avenue and future improvements to the SR-57/SR-60 confluence. These improvements will enhance freeway operations by reducing traffic weaving and improve safety at the SR-57/SR-60 confluence, ranked number one in California and number 11 in the nation for freight delays and the second-worst truck-involved accident location in Southern California. We appreciate your patience during the temporary closures of the golf course and look forward to welcoming you back in early 2023.

Golf Course Improvements

The reconfiguration will create an improved experience for golfers with a redesigned 18-hole layout, and improved fairways and greens.

  • Three new tees installed, for a total of five tees at each hole

  • Sand traps added

  • Construction of new maintenance facility

  • Replacement of course irrigation system

  • Course par will remain the same

  • Yardage will remain the same

Alternate Golf Courses

During the closure of Diamond Bar Golf Course, the community has several other nearby LA County Department of Parks and Recreation public golf courses to use which have comparable green fees, costs, and facilities.

Project Fact Sheets

Golf Course Reconfiguration

  • Construct/reconstruct 18 tee complexes with sufficient area for five sets of tees.

  • Construct/reconstruct 18 green complexes with greenside sand bunkers.

  • Retention of wall to wall cart path through the entire 18 holes.

  • Construct/reconstruct fairway sand bunkers.

  • The existing practice putting green, reconstructed in 2016, will be protected in place.

  • The existing #9 green will be reconstructed as a practice chipping green.

  • The existing driving range tee line reconstructed in 2016 will be protected in place.

  • The existing concrete swales (referred to as Blue Line streams in the 06/24/2010 remedial requirements) will be removed and replaced with drain pipe, filled over with dirt to blend with the surrounding terrain, and grassed over.

  • Protective screening will be constructed in the following proposed hole locations:

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