Maryvale's home-course advantage paid dividends Wednesday afternoon in Brooklandville when the Lions topped Bryn Mawr and Annapolis Area Christian School, both by 19-38, in an Interscholastic Athletic Association of Maryland B Conference tri-meet.

It was the first defeat for the defending champion Mawrtians since the 2011 season, and raises the question about which team will have the psychological edge when the rivals meet in the conference championships Oct. 30 at Oregon Ridge Park.

Maryvale sophomore Kendall Gray's stellar 20:51 shattered the 3.03-mile course record (22:49) she set two weeks ago against Roland Park Country School, beating Bryn Mawr freshman Amy Egan (21:11) and AACS's Julia Schaefer (21:49) in the process.

Gray's senior sister, Parker (21:51) just missed finishing third. She was followed by Lion classmate Colleen Cook (21:54). Callie Phillips (6th, 22:14) and Victoria Sill (7th, 22:20) were the other top-10 finishers for Maryvale in a performance that surprised — and pleased — coach Jason Miller.

"We told Kendall that we wanted the Bryn Mawr girls to be looking at her back," Miller said. "We didn't want her looking at the Bryn Mawr girls' backs. We knew she could do something like that."

Junior Alexa Corse (9th, 22:32) was the only other Bryn Mawr runner among the top-10 finishers, although sophomore Elizabeth Dearing (11th, 22:56) was the final runner to go under 23 minutes on the rugged, hilly course.

"I expected it to be much closer than it was," Bryn Mawr coach Jim Lancaster said. "We just weren't aggressive today. But we still have three weeks left."