Date
|
Race Name Distance (miles)
|
Track
|
Location
|
Type
|
Notes
|
Pole position
|
Winning driver
|
February 22
|
Oakland Trophy (98)
|
Portola Road Race Course
|
Oakland, California
|
10.923-mile road course
|
Open to cars under 300 cu in displacement.
|
|
Charles Bigelow
|
St. Francis Hotel Trophy Race (153)
|
Open to cars 301–600 cu in displacement
|
|
Charles Merz
|
Panama-Pacific Race (164)
|
Free-for-all, Stopped after 15 of 19 laps for darkness
|
Jack Fleming
|
Bert Dingley
|
March 28
|
Jacksonville Race (100)
|
Pablo Beach Course
|
Jacksonville Beach, 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; Sam Dickson, riding mechanic for Arthur Greiner, fatally injured[2]
|
Lewis Strang
|
Ray Harroun
|
July 4
|
Tevis Cup Race (145)
|
Bakersfield Road Race Course
|
Bakersfield, California
|
11.15 Mile Road Course
|
|
|
Harvey Herrick
|
August 25
|
Kane County Trophy Race* (169)
|
Elgin Road Race Course
|
Elgin, Illinois
|
8.47 Mile Road Course
|
Entrants limited to cars 231–300 in3; Ralph Ireland fatally injured in practice[3]
|
|
Hughie Hughes
|
Illinois Trophy Race* (203)
|
Entrants limited to cars 301 to 450 in3
|
|
Don Herr
|
August 26
|
Elgin National Trophy Race (305)
|
<600 ci, Grandstand collapse on lap 2, restarted 35 minutes later; Dave Buck and his riding mechanic Sam Jacobs fatally injured[4]
|
|
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 600–750 ci
|
|
Erwin Bergdoll
|
Philadelphia Race 2* (200)
|
limited to cars with 451–600 ci
|
|
Ralph Mulford
|
Philadelphia Race 3* (200)
|
limited to cars with 301–450 ci
|
|
Louis Disbrow
|
Philadelphia Race 4* (200)
|
limited to cars with 231–300 ci
|
|
Hughie Hughes
|
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 Keen
|
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
|
William K. Vanderbilt Cup (290)
|
Savannah-Effingham Raceway
|
Savannah, Georgia
|
17.1-mile road course
|
Jay McNay and his riding mechanic Henry Maxwell fatally injured in practice[5][6]
|
Harry Grant
|
Ralph Mulford
|
November 30
|
American Grand Prize (410)
|
ACA sanction
|
|
David Bruce-Brown
|