The 2005 Liberty Challenge 100 was Round 6 of the 2005 Menards IRL Infiniti Pro Series. The event was held at Indianapolis Motor Speedway in Indiana, United States on 18 June 2005. Marco Andretti was the race winner.
Liberty Challenge Race Result
| Pos. | No. | Driver | Chassis | Engine | Tire | Laps | Laps Led | Status | Started | Points |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 26 | Marco Andretti | Dallara | Infiniti | Firestone | 25 | 25 | Running | 1 | 53 |
| 2 | 33 | Wade Cunningham | Dallara | Infiniti | Firestone | 25 | 0 | Running | 4 | 40 |
| 3 | 19 | Chris Festa | Dallara | Infiniti | Firestone | 25 | 0 | Running | 6 | 35 |
| 4 | 21 | Nick Bussell | Dallara | Infiniti | Firestone | 25 | 0 | Running | 2 | 32 |
| 5 | 1 | Jaime Camara | Dallara | Infiniti | Firestone | 25 | 0 | Running | 5 | 30 |
| 6 | 3 | Arie Luyendyk Jr. | Dallara | Infiniti | Firestone | 25 | 0 | Running | 8 | 28 |
| 7 | 7 | Travis Gregg | Dallara | Infiniti | Firestone | 25 | 0 | Running | 9 | 26 |
| 8 | 4 | Marty Roth | Dallara | Infiniti | Firestone | 25 | 0 | Running | 7 | 24 |
| 9 | 6 | Jon Herb | Dallara | Infiniti | Firestone | 25 | 0 | Running | 10 | 22 |
| 10 | 20 | Jay Drake | Dallara | Infiniti | Firestone | 25 | 0 | Running | 11 | 20 |
| 11 | 9 | Ed Carpenter | Dallara | Infiniti | Firestone | 25 | 0 | Running | 13 | 19 |
| 12 | 91 | Mishael Abbott | Dallara | Infiniti | Firestone | 23 | 0 | Running | 12 | 18 |
| 13 | 24 | Jeff Simmons | Dallara | Infiniti | Firestone | 13 | 0 | Running | 3 | 17 |
| DNS | 36 | Larry Connor | Dallara | Infiniti | Firestone | 0 | 0 | Did not start | 14 | 16 |