Diamond Bar Events in October

Events in October in Diamond Bar

With a bunch of festivals in October 2025 in Diamond Bar queued up, there is a lot to catch on! From being a spectator at all the cool festivals to attending some interesting events in October in Diamond Bar there is all the fun awaiting you this month. Take a tour to this interesting guide or list of things to do in Diamond Bar in October 2025 and make the most of your holidays and weekends!

LA Fashion Week - Fashion Beyond Borders

Sun, 26 Oct at 02:00 pm

103+ Interested

Paranormal Cirque II - Lake Elsinore, CA - October 17 - 20, 2025

Brushstrokes & Books: Alessandro Concas Book Signing and Reading at Color Me Mine Valencia

Sat, 25 Oct at 10:00 am

The Mayor's Senior Prom

Thu, 09 Oct at 04:00 pm

Events in October in Diamond Bar

Events in October in Diamond Bar

Thu, 02 Oct

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Diamond Bar Golf Course

Mujer Legendaria de Ford
04-05 Oct

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Bowlium Lanes & Oak Tree Lanes

420 Any Combo Doubles - Special 2 Day Event!
Sat, 25 Oct

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Diamond Bar Golf Course

Diamond Bar High School Class of 1985 40th Reunion Celebration
Mon, 06 Oct

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Diamond Bar Golf Course

Golf for Business Symposium & Golf Fashion Show

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