The 2015 Pro Mazda Championship Winterfest was the second winter championship promoted by the series, the first being in 2014. It served as a prelude to the 2015 Pro Mazda Championship season. It consisted of five races held during two race meets, alongside the 2015 U.S. F2000 Winterfest. The previous edition included only four races, with two at each track.
Team Pelfrey's Jack Aitken and Andretti Autosport driver Weiron Tan were the main title protagonists, sharing all five victories between them. Tan amassed the most points with race results – two wins and three second places – but a five-point penalty for unsportsmanlike conduct on the podium at NOLA Motorsports Park allowed Aitken to take the championship title by one point ahead of Tan. Third place went to Tan's team-mate Dalton Kellett, who took his only podium finish in the final race at Barber Motorsports Park, which awarded double points after one of the track's scheduled three races was canceled due to bad weather.
All teams are American-registered.
| Team | Drivers | Notes | |
|---|---|---|---|
| Andretti Autosport | 22 |  Weiron Tan[1] | |
| 28 |  Dalton Kellett[2] | ||
| Cape Motorsports Wayne Taylor Racing | 2 | Daniel Burkett[3] | |
| 10 |  Florian Latorre | ||
| JDC Motorsports | 19 |  Raoul Owens | |
| 54 |  Michael Johnson | ||
| Juncos Racing | 5 | Garett Grist[4] | |
| 6 | Timothé Buret[5] | ||
| 7 |  Jose Gutierrez | ||
| 23 | Will Owen[6] | ||
| M1 Racing | 18 | Nicholas Latifi | |
| 24 | Tristan DeGrand | Barber only | |
| 33 |  Carlos Conde | Expert class; NOLA only | |
| Team Pelfrey | 82 | Jack Aitken | |
| World Speed Motorsports | 13 | Bobby Eberle | Expert class |
| 14 | Alessandro Latif[7] |
The series schedule, along with the other Road to Indy series schedules, was announced on November 3, 2014.[8]
| Round | Rnd | Circuit | Location | Date | Pole position | Fastest lap | Most laps led | Winning driver | Winning team |
|---|---|---|---|---|---|---|---|---|---|
| 1 | NOLA Motorsports Park | Avondale, Louisiana | February 19 | Jack Aitken | Weiron Tan | Jack Aitken | Jack Aitken | Team Pelfrey | |
| 2 | February 20 | Weiron Tan | Weiron Tan | Weiron Tan | Andretti Autosport | ||||
| 3 | Jack Aitken | Jack Aitken | Jack Aitken | Team Pelfrey | |||||
| 4 | Barber Motorsports Park | Birmingham, Alabama | February 25 | Canceled due to weather | |||||
| 5 | February 26 | Will Owen | Jack Aitken | Jack Aitken | Team Pelfrey | ||||
| 6 | Jack Aitken | Weiron Tan | Weiron Tan | Andretti Autosport |
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