The Warriors (4-2) jumped out to a 15-6 lead in the final minute of the first quarter and led 24-14 at the half behind their initial surge.
"We tried to pick up the pace a little bit and create some turnovers and it kind of worked out for us," Riverside head coach Jenny Taylor said.
Haven Rice led the Tigers (1-3) with 11 points.
Both teams will begin play in their respective regions before the Christmas break.
Here's a look ahead for both:
RIVERSIDE
Jordan-Brown is the lone senior on this year's roster, meaning a young Riverside team will have to grow up quickly in a stacked Region II-4A.
"It's going to get a lot tougher," Taylor said. "We haven't seen anything yet.
The Warriors will open their region schedule next week with Dorman and Wade Hampton, both favorites to finish atop the region standings.
"They're two of the best teams in our region," Taylor said. "We go to Dorman, and that's always a tough place to play. Wade Hampton is just loaded, so it's going to take a great effort to stay up with those guys."
Point-guard Sarah Cline suffered a sprained ankle Monday night against Eastside but should be back in time for next week's region contests.
Jordan-Brown, who signed in November to play at UNC-Asheville, returns as the focal point of Riverside's offense and its team leader.
"Brooke is a very good player -- she's just worked hard for years; she's been here since she was an eighth grader," Taylor said. "She is a leader for us, and she's a great inside presence. She's got great moves inside and she's a great rebounder and shot blocker, but she's a great leader, too, and that's a great help to us."
BLUE RIDGE
First-year head coach Jordan Mathis is seeing some steady improvement as her team heads into its Region II-3A slate.
And Mathis, a former Greer standout who graduated from Carson-Newman University in May, said she's learning a lot as well.
"It's definitely a new experience," said Mathis, who replaced Byron Hardy as Blue Ridge's girls basketball coach during the summer. "I've got a lot to learn, for sure. I've been learning and adjusting to my team because I wasn't very familiar with them. I'm enjoying it, but there's a lot to do."
Mathis said her team is concentrating on playing a tough, defensive style of defense.
But the team, like the coach, is young. It is also short on numbers with only nine players on a roster that includes Breanna Edwards, Brittany Kern, Mary Blair Garabroian, Ana Caroline Mostellar, Farris Roach, Sierra Harley, Jayla Williams, McKylie Bowen and Haven Rice.
The Tigers begin region play this weekend with Berea.
Mathis said she figures her alma mater, Greer, and Eastside to be among the teams to beat as region play gets started in earnest after the Christmas break.
"I'd love to finish in the top (four) to secure a playoff spot and get that experience," Mathis said of her team.
Tuesday's box score
BLUE RIDGE (31)
Breanna Edwards 1 0-1 2, Brittany Kern 2 0-0 4, Mary Blair Garabroian 2 0-0 2, Sierra Halley 1 0-0 2, Jayla Williams 3 0-0 6, McKylie Bowen 1 2-2 4, Haven Rice 4 1-2 11.
RIVERSIDE (49)
Natalie Boulos 1 0-0 3, Ashley Boggs 1 0-0 2, Brooke Jordan-Brown 9 11-13 29, Abbey McGatha 2 2-2 6, Keke Martin 2 2-2 6, Megan Lamb 2 0-0 4.
Halftime: Riverside 24, Blue Ridge 14. Fouled out: BR - Anna Caroline Mostellar. 3-point FGs -- Rice (2), Boulos.