Ray,
My map is a bit rough but the course circuit was on roads still used today not far from San Diego Airport.
Name: 1915 San Diego Road Race circuit - Copy.jpg Views: 510 Size: 56.7 KB

Name: San Diego- Point Loma_ Road circuit. - Copy.JPG Views: 406 Size: 129.5 KB
(Note location of the British Foreign Car Shop.)

Name: 1915 Point Loma race.jpg Views: 877 Size: 149.5 KB
1915 winner climbing Chatsworth Blvd.

Name: San Diego race circuit . Climbing on Chatsworth from Rosecrans.JPG Views: 1904 Size: 80.0 KB
Chatsworth Blvd today from approx. same location.


(Ken H..)