F25-29 at the B.A.A. 10K: Kwanboka holds off a hard-charging field in the heat

• Gladys Kwanboka won the F25-29 age group in 31:39 (5:06/mi), finishing 2nd among all women in the race.
• Jesca Chelangat was 21 seconds back in 2nd, with Chloé Herbiet a further 9 seconds behind in 3rd — a 30-second spread across the top three.
• Kwanboka posted the 2nd-fastest women's split on the 5K–8K segment; Chelangat was 4th on that same stretch, and Herbiet 6th — the podium dominated that middle portion of the race.
• Megan Hasz (Dorchester, MA) climbed from 12th among women at the 5K mark to 10th at the finish, posting the 8th-fastest women's closing split from 8K to the line — the strongest mover in the top ten.

Ninety-three degrees in Boston on a June morning is not a footnote — it's a filter. Against that backdrop, Gladys Kwanboka ran 5:06/mi for 6.2 miles and won the F25-29 age group going away. She opened the race sitting 1st among women, slipped briefly to 2nd by the midpoint, and held that position through the finish. The 2nd-fastest women's split on the 5K–8K segment tells you she wasn't coasting — she was racing through the heat when it mattered most.

Jesca Chelangat kept it honest. Sitting 2nd among women early, she faded slightly to 4th on the women's leaderboard by the 5K mark and stayed there, but her 4th-fastest women's split on the 5K–8K segment shows she was still moving with purpose. Her 32:00 — 21 seconds behind Kwanboka — was good enough for 2nd in the age group. Chloé Herbiet came from 7th among women at the 5K to 6th at the finish, running 32:09 to complete a podium that was never seriously threatened after the midpoint.

The most compelling subplot belonged to Megan Hasz. The Dorchester local was 12th among women at the 5K, 10th at 8K, and 10th at the finish — a steady, disciplined climb that earned her 4th in the age group and the 8th-fastest women's closing split of the day. In a 961-runner F25-29 field on a sweltering morning, that kind of composed progression stands out. The gap from Hasz back to 5th-place Amy Davis-Green was 1:25 — the race's largest single step between consecutive top-five finishers.