The 2018 Mazda St. Louis Indy Lights Oval Challenge was Round 15 of the 2018 Indy Lights series. The event was held at Gateway in Illinois, United States on 25 August 2018. Ryan Norman was the race winner.
Mazda St. Louis Indy Lights Oval Challenge Race Result
| Pos. | No. | Driver | Chassis | Engine | Tire | Laps | Race Time | Laps Led | Status | Pit Stops | Avg. Speed | Started | Points |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 48 | Ryan Norman | Dallara | Mazda | Cooper | 75 | 35:57.6102 | 6 | Running | 0 | 156.423 | 2 | 45 |
| 2 | 98 | Colton Herta | Dallara | Mazda | Cooper | 75 | 35:57.8157 | 69 | Running | 0 | 156.408 | 1 | 40 |
| 3 | 27 | Patricio O'Ward | Dallara | Mazda | Cooper | 75 | 36:12.0576 | - | Running | 0 | 155.383 | 3 | 33 |
| 4 | 5 | Santi Urrutia | Dallara | Mazda | Cooper | 75 | 36:15.7907 | - | Running | 0 | 155.116 | 7 | 29 |
| 5 | 9 | Aaron Telitz | Dallara | Mazda | Cooper | 75 | 36:16.0509 | - | Running | 0 | 155.097 | 4 | 26 |
| 6 | 23 | Victor Franzoni | Dallara | Mazda | Cooper | 75 | 36:17.1992 | - | Running | 0 | 155.016 | 6 | 23 |
| 7 | 28 | Dalton Kellett | Dallara | Mazda | Cooper | 74 | 36:03.4717 | - | Running | 0 | 153.919 | 5 | 21 |