California's Jahvid Best rushed 137 yards and scored two touchdowns.
Riley connected on 17-of-26 passes for 298 yards for the Golden Bears (1-0), who entered halftime with a 31-6 lead. California had 542 yards of total offense.
Maryland's Chris Turner finished 17-of-30 passing for 167 yards for the Terrapins (0-1), who beat the Golden Bears 35-27 last September.
Notable deaths of 2014 [PHOTOS]