| Date | Event Name | Location |
| 10/1 – 10/16 | Stuart Little Series | Lewis Family Playhouse |
| 10/7 – 10/9 | Harvest Festival | Ontario Convention Show |
| 10/8 | Tombstone Cinema: Beetlejuice | Evergreen Memorial Historic Cemetary |
| 10/8 | ZZ Top | Agua Caliente Casino |
| 10/13 | Russian Grand Balet | 3801 Mission Inn Avenue |
| 10/14 | Masquerade Ball at the Burrage Mansion | Burrage Mansion – 1205 West Crescent Avenue |
| 10/15 | Peanuts The Great Pumpkin Patch | Orange Empire Railway Museum |
| 10/22 – 10/23 | Footloose | California Theatre |
| 10/22 – 10/23 | California Trucking Show | Ontario Convention Show |
| 10/23 | Fifth Annual Family Fun Day | McCallum Theatre |
| 10/28 | Ghost Walk Riverside 2016 | 3832 Main Street – Riverside |
| 10/28 | 2016 Joshua Tree Night Sky Festival | Joshua Tree National Park |
| 10/29 | See Jane Sing | McCallum Theatre |
| 10/29 | Heroes vs Villians 5k and Flag Gauntlet | Corona High School – Panther Stadium |
| 10/29 | Halloween Festival | Citrus Plaza Shopping Center |
| 10/30 – 10/31 | Howl-O-Ween | Living Desert Zoo |
