The 6-foot Riley, who also played for United NJ AAU, paced the Cougars with 378 points on a well-balanced team that claimed a sectional crown last season. She also grabbed 168 rebounds and made 26 steals.
Chatham wins the NJSIAA Tournament, North Jersey, Section 2, Group 3 Title.
Junior Riley Allen drained a team-best 11 points while Kreuzer contributed 10 in the win. Senior Caryl Frohnapfel and Barrett added eight and six points, respectively. Junior Madison Jenisch scored a game-high 13 points for Randolph.
Riley led Chatham with 19 points, including the game-winning three.
Addison Barrett scored a team-best 14 points while Mia Semioli had 13 and Allen Riley and freshman Ella Kreuzer scored 12 apiece for the Cougars.
Allen poured in a game-high 14 points and grabbed 10 rebounds while Tortorella drained three three-pointers en route to scoring 11 points. Freshman guard Mia Semioli contributed nine points in the win while senior Caryl Frohnapfel added seven and pulled a bunch of rebounds.
Chatham is 13-9, while Morris Catholic is 18-1.
Chatham Lady Cougars basketball improve to 13-8.
Chatham (12-8) will square off versus top-seeded Morris Catholic (17-1) in the MCT semifinals on Friday at 6:30 p.m.
Chatham beat Kinnelon, 52-31, at home on Saturday in the first round of the MCT, while host Jefferson routed Morris Knolls, 52-28, on the same day.