Women's Race: Obiri Dominates in Boston Heat

• Hellen Obiri wins in 31:21, leading wire-to-wire and posting the fastest women's split on the 5K–8K stretch to seal it.
• Four women finish within 14 seconds — Obiri (31:21), Ndiwa (31:25), Chepkirui (31:27), and Sisson (31:35) — in a brutally competitive front pack on an 85°F morning.
• Stacy Ndiwa's closing kick was the sharpest in the field, running the fastest women's split from 8K to the finish to rocket from 5th at the opening 5K mark all the way to 2nd.
• Edna Kiplagat, at 43, finished 10th in 32:46 — and had placed 3rd here in 2022 with a 32:09, making her continued presence near the sharp end of a 4,112-woman field a genuine story in itself.

Hellen Obiri owned this race from the gun. She sat in first among the women through every checkpoint, and when the race's decisive stretch arrived — the 5K-to-8K segment — she posted the fastest women's split of the day to make the lead stick. In 85°F heat with 64% humidity, running 5:03/mi for 6.2 miles is a performance that demands respect. She crossed in 31:21, four seconds clear of the field.

The silver medal was earned late. Stacy Ndiwa was 5th through the first 5K, climbed to 3rd by 8K, and then unleashed the fastest closing split among all women to finish in 31:25 — a genuine catch-up on Sheila Chepkirui, who had held 2nd through 8K but faded slightly to 3rd in 31:27. These two ran nearly identical finish times, but the final miles told very different stories: Ndiwa surging, Chepkirui holding on.

Emily Sisson brought American pride to the top four, finishing 4th in 31:35 at 5:05/mi. She had finished 2nd here in 2022 with a 32:03, so this year's field — and her 4th-place result — reflects just how deep the front end had gotten. Mary Ngugi rounded out the top five in 31:45, running the second-fastest closing split from 8K to the finish, a quiet reminder that she, too, was moving through the field in those final kilometers.

Further back, the heat began to show its teeth. Molly Seidel was 17th in 33:35, and the gap from 10th to 20th stretched from 32:46 to 35:00 — over two full minutes across ten places in a women's field of 4,112.