1912 Montamarathon Fiesta Race (301-450ci Class) is 70th AAA National Motor Car Championship race. Passed at the Tacoma circuit. Earl Cooper won the pole position and this race. Earl Devore and James Rossi also climbed to the podium, in second and third place. Race distance 30 laps (241 km).
1st victory for the Earl Cooper
2nd podium for the Earl Cooper
2nd podium for the Earl Devore
1st podium for the James Rossi