Centennial slipped past River Hill by a four-second margin to claim the 3A East region cross-country championship.

The schools tied for first place with 35 points apiece, requiring a tiebreaker of the team’s sixth runners’ posted time. Centennial’s Anna Li’s 21 minutes 4 seconds barely beat River Hill’s Eileen Ying’s 21:08, with Li finishing in 14th place and Ying 17th.

“It was close. We’ve got six girls that are solid,” Centennial Coach Kevin McCoy said. “We had six girls in the top 15 this week and six girls in the top 12 last week [at the Howard County Championships]."

Centennial’s Shreya Nalubola won the girls’ individual race (19:03), with River Hill’s Allison Krein (19:34) and Reservoir’s Karli Smiraglia (19:36) rounding out the top three.

Finishing third in the team meet behind Centennial and River Hill was Reservoir with 84 points.

Wilde Lake’s David Eisenhauer (16:40) won the boys’ 3A East region meet, with River Hill’s Chris Heydrick (16:50) and Mount Hebron’s Ben Weinstein (16:54) finishing second and third.

Mount Hebron (49) won the team title. Centennial (58) and River Hill (70) placed behind the Vikings.

Around the regions

In the girls 4A West region meet, Bethesda-Chevy Chase’s Nora McUmber won with a time of 18:23.8. Whitman’s Evan Woods won the boys’ race in 15:51.83. Whitman’s boys and Walter Johnson’s girls won the region team titles. . . .

Paint Branch’s boys’ team qualified for the state meet with a second-place finish in the 4A North region. The Panthers finished runners-up to Dulaney, which had the top two runners. Paint Branch Coach Dessalynn Dillard said her top runner Lorenzo Neil finished third with what she believed to be a time of 16:09.8. . . .

Northwood’s girls’ cross-country team is returning to the state meet for the first time since 1977, according to Coach Michael Sauter.

Northwood’s girls’ placed seventh with 184 points, just making the cutoff. Of the Montgomery County schools in the 3A West region, Einstein’s girls (81) had the best showing, finishing in third place behind Urbana (50) and Linganore (78).

In the 3A West region boys’ race, Montgomery County state qualifiers were Einstein (107, fourth), Northwood (152, fifth) and Wheaton (175).

The boys’ winner was Thomas Johnson (44). . . .

In the 2A South region, the boys’ winner was Patuxent’s Trent Herzog (17:15). Winning the girls’ race was Calvert’s Elizabeth Hite (19:42). Marriotts Ridge’s boys and Calvert’s girls were region champions.

With the wind gusting at the cross-country course at Liberty High School in Sykesville, Md., Poolesville’s Chase Weaverling was able to still run to the 2A West region title.

Weaverling set an early pace and cruised to a win with a time of 16:10.9. The course was a little longer than 3.1 miles, and the wind picked up during the duration of the run.

“I felt pretty strong today, even though I ran a little slower than at the invitational,” Weaverling said.

Poolesville’s boys’ team (89) finished second behind Catoctin (62). The girls’ team won the 2A West title with 70 points. Claire Beautz led the way for the Falcons with a time of 19:50.7.