Mazda St. Louis
Indy Lights Oval Challenge
Gateway Motorsports Park
1.25 Mile Paved Oval
75 Laps/93.75 Miles
August 25, 2018
| Finish | Start | Driver | Car # | Sponsor/Name | Chassis | Engine | Laps | Status | Points |
| 1 | 2 | Ryan Norman | 48 | Journey | Dallara IL-15 | Mazda MZR-R | 75 | 0:35:57.6102 156.423 | 45 |
| 2 | 1 | Colton Herta | 98 | Deltro Energy | Dallara IL-15 | Mazda MZR-R | 75 | 0:35:57.8157 156.408 | 40 |
| 3 | 3 | Patricio O'Ward | 27 | Riverina CDMX Mexico City | Dallara IL-15 | Mazda MZR-R | 75 | 0:36:12.0576 155.383 | 33 |
| 4 | 7 | Santiago Urrutia | 5 | BSE | Dallara IL-15 | Mazda MZR-R | 75 | 0:36:15.7907 155.116 | 29 |
| 5 | 4 | Aaron Telitz | 9 | Rice Lake Weighing Systems | Dallara IL-15 | Mazda MZR-R | 75 | 0:36:16.0509 155.097 | 26 |
| 6 | 6 | Victor Franzoni | 23 | Mazda | Dallara IL-15 | Mazda MZR-R | 75 | 0:36:17.1992 155.016 | 23 |
| 7 | 5 | Dalton Kellett | 28 | K-Line Insulators USA | Dallara IL-15 | Mazda MZR-R | 74 | Flagged | 21 |