Tucson Race
Tucson Road Race Course
4.298 Mile Road Course
24 Laps/103.152 Miles
March 20, 1915
| Finish | Start | Driver | Car # | Sponsor/Name | Chassis | Engine | Laps | Status |
Points |
| 1 | X | Barney Oldfield | 3 | Maxwell | Maxwell | Maxwell | 24 | 1:31:59 67.285 | 200* |
| 2 | X | William Carlson | 9 | Maxwell | Maxwell | Maxwell | 24 | 1:33:35 66.135 | 110* |
| 3 | X | Robert Delno | 6 | Moon | Moon | Moon | 24 | 1:45:39 58.581 | 60* |
| 4 | X | Eddie Rickenbacker | 11 | Maxwell | Maxwell | Maxwell | 24 | 1:51:59 55.268 | 35* |
| 5 | X | Tom Brewer | 8 | Marmon | Marmon | Marmon | 24 | 1:53:18 54.626 | 20* |
| 6 | X | M. C. Hubbell | 2 | Mercer | Mercer | Mercer | 19 | Flagged | 15* |
| 7 | X | Charles Miller | 7 | Mitchell | Mitchell | Mitchell | 17 | Flagged | 10* |
| 8 | X | Dick Clarke | 1 | Stutz | Stutz | Stutz | 2 | Broken connecting rod | |
| 9 | X | Ike Williams | 5 | Mitchell | Mitchell | Mitchell | 0 | Broken wheel | |
| -- | -- | J. J. Garfield | 12 | Buda-Elmore | Elmore | Elmore | -- | Did not start | |
| -- | -- | J. O. Maxwell | 10 | Fiat | Fiat | Fiat | -- | Did not start | |
| -- | -- | Frank Crum | 4 | Buick | Buick | Buick | -- | Disqualified, technical committee |
Known riding mechanics in this race:
| Finish | Start | Driver | Mechanic | Car # | Sponsor/Name | Chassis | Engine | Laps | Status |
| 1 | X | Barney Oldfield | Harry Goetz | 3 | Maxwell | Maxwell | Maxwell | 24 | 1:31:59 67.285 |
| 2 | X | William Carlson | Paul Franzen | 9 | Maxwell | Maxwell | Maxwell | 24 | 1:33:35 66.135 |
| 3 | X | Robert Delno | Bivin | 6 | Moon | Moon | Moon | 24 | 1:45:39 58.581 |
| 4 | X | Eddie Rickenbacker | Erick Schrader | 11 | Maxwell | Maxwell | Maxwell | 24 | 1:51:59 55.268 |
| 5 | X | Tom Brewer | Pence | 8 | Marmon | Marmon | Marmon | 24 | 1:53:18 54.626 |
| 6 | X | M. C. Hubbell | William Kientop | 2 | Mercer | Mercer | Mercer | 19 | Flagged |
| 7 | X | Charles Miller | Brewster | 7 | Mitchell | Mitchell | Mitchell | 17 | Flagged |
| 8 | X | Dick Clarke | Frank Clarke | 1 | Stutz | Stutz | Stutz | 2 | Broken connecting rod |
| 9 | X | Ike Williams | J. L. Farragh | 5 | Mitchell | Mitchell | Mitchell | 0 | Broken wheel |
| -- | -- | J. J. Garfield | Gearin | 12 | Buda-Elmore | Elmore | Elmore | -- | Did not start |
| -- | -- | J. O. Maxwell | J. D. Clyde | 10 | Fiat | Fiat | Fiat | -- | Did not start |
| -- | -- | Frank Crum | George Caywood | 4 | Buick | Buick | Buick | -- | Disqualified, technical committee |
| Lap Leaders | Total | Laps |
| Barney Oldfield | 23 | 2-24 |
| Dick Clarke | 1 | 1 |