The 2005 California 100 was Round 14 of the 2005 Menards IRL Infiniti Pro Series. The event was held at Auto Club Speedway in Fontana, California, United States on 16 October 2005. Wade Cunningham was the race winner.
California 100 Race Result
| Pos. | No. | Driver | Chassis | Engine | Tire | Laps | Laps Led | Status | Started | Points |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 33 | Wade Cunningham | Dallara | Infiniti | Firestone | 50 | 28 | Running | 5 | 37 |
| 2 | 24 | Jeff Simmons | Dallara | Infiniti | Firestone | 50 | 0 | Running | 7 | 40 |
| 3 | 7 | Travis Gregg | Dallara | Infiniti | Firestone | 50 | 22 | Running | 1 | 36 |
| 4 | 19 | Chris Festa | Dallara | Infiniti | Firestone | 50 | 0 | Running | 3 | 32 |
| 5 | 9 | Nick Bussell | Dallara | Infiniti | Firestone | 50 | 0 | Running | 6 | 30 |
| 6 | 25 | Arie Luyendyk Jr. | Dallara | Infiniti | Firestone | 50 | 0 | Running | 10 | 28 |
| 7 | 4 | Marty Roth | Dallara | Infiniti | Firestone | 50 | 0 | Running | 4 | 26 |
| 8 | 11 | PJ Abbott | Dallara | Infiniti | Firestone | 49 | 0 | Running | 14 | 24 |
| 9 | 6 | Jon Herb | Dallara | Infiniti | Firestone | 47 | 0 | Running | 13 | 22 |
| 10 | 1 | Jaime Camara | Dallara | Infiniti | Firestone | 45 | 0 | Running | 2 | 20 |
| DNF | 23 | Taylor Fletcher | Dallara | Infiniti | Firestone | 7 | 0 | Accident | 9 | 19 |
| DNF | 20 | Jay Drake | Dallara | Infiniti | Firestone | 0 | 0 | Accident | 12 | 18 |
| DNS | 3 | Bobby Wilson | Dallara | Infiniti | Firestone | 0 | 0 | Did not start | 8 | 17 |
| DNS | 27 | Geoff Dodge | Dallara | Infiniti | Firestone | 0 | 0 | Did not start | 11 | 16 |