Date |
Race name, (Distance) |
Track |
Location |
Type |
Notes |
Pole position |
Winning driver |
February 22 |
Oakland Trophy (98) |
Portola Road Race Circuit |
Oakland, California |
10.923-mile road course |
Open to cars under 300 cu in displacement. |
|
Charles Bigelow |
Panama-Pacific Race 1 (153) |
Open to cars 301–600 cu in displacement |
|
Charles Merz |
Panama-Pacific Race 2 (164) |
Free-for-all, Stopped after 15 of 19 laps for darkness |
Jack Fleming |
Bert Dingley |
March 28 |
Jacksonville Beach Race (100) |
Jacksonville Beach |
Jacksonville, Florida |
5 mile beach oval |
600 cu in or less and 2300 pounds minimum weight. |
|
Louis Disbrow |
May 30 |
International 500 Mile Sweepstakes |
Indianapolis Motor Speedway |
Speedway, Indiana |
2.5 mile brick oval |
Qualifications based upon demonstrated 75 mph main stretch speed, 40 car field |
Lewis Strang |
Ray Harroun |
July 4 |
Bakersfield Race (145) |
Bakersfield Road Race Circuit |
Bakersfield, California |
11.15 Mile Road Course |
|
|
Harvey Herrick |
August 25 |
Illinois Trophy Race* (203) |
Elgin Road Race Circuit |
Elgin, Illinois |
8.47 Mile Road Course |
Entrants limited to cars 301 to 450 in³ |
|
Don Herr |
Kane County Trophy Race* (169) |
Entrants limited to cars 231–300 in³ |
|
Hughie Hughes |
August 26 |
Elgin National Trophy Race (305) |
<600 ci, Grandstand collapse on lap 2 restarted 35 minutes later, Dave Buck fatally injured |
|
Len Zengel |
September 9 |
Hamilton County Trophy Race* (150) |
Cincinnati Road Race Course |
Cincinnati, Ohio |
7.9 Mile Road Course |
Stock chassis, 300 cu in and under. |
|
John Jenkins |
Cincinnati Trophy Race* (200) |
Free-for-all class, 600 ci and under |
|
Eddie Hearne |
October 9 |
Philadelphia Race 1* (200) |
Fairmount Park |
Philadelphia, Pennsylvania |
8.1 Mile Road Course |
limited to cars with 231–300 ci |
|
Hughie Hughes |
Philadelphia Race 2* (200) |
limited to cars with 301–450 ci |
|
Louis Disbrow |
Philadelphia Race 3* (200) |
limited to cars with 451–600 ci |
|
Ralph Mulford |
Philadelphia Race 4* (200) |
limited to cars with 600–750 ci |
|
Erwin Bergdoll |
October 14 |
Chanslor & Lyon Trophy Race (100) |
Santa Monica Road Race Course |
Santa Monica, California |
8.417 Mile Road Course |
Stock chassis, 230 cu in. |
Charles Soules |
Louis Nikrent |
Jepsen Trophy Race (150) |
231–300 ci, Run Concurrently with 301–450 ci |
|
Bruce Keene |
Leon Shettler Cup Race (150) |
301–450 ci, Run Concurrently with 231–300 ci |
Bert Dingley |
Charles Merz |
Dick Ferris Trophy Race (200) |
Free-For-All |
Howdy Wilcox |
Harvey Herrick |
November 27 |
Vanderbilt Cup Race (290) |
Savannah-Effingham Raceway |
Savannah, Georgia |
17.1-mile road course |
Jay McNay fatally injured November 20 during practice |
Harry Grant |
Ralph Mulford |
November 30 |
American Grand Prize (410) |
ACA sanction |
|
David Bruce-Brown |