W35-39: Hellen Obiri Owns the NYC Half from Gun to Tape

• Obiri wins in 1:06:33 (5:05/mi) — the fastest women's finish on the day, leading the women's field wire-to-wire through every checkpoint.
• Fastest women's split on the 5K→10K segment, adding a mid-race surge to her already dominant margin over the W35-39 field.
• Susanna Sullivan runs 1:09:38 to claim 2nd in the age group, climbing from 11th among women at the opening checkpoint to 9th by the finish — a steady, well-executed race.
• 37 seconds separate 4th and 5th: Kerry Allen (1:16:58) edges Lauren Philbrook (1:17:35), while a tight cluster of six women finish between 1:18:46 and 1:21:12.

On a crisp 40°F morning in New York, conditions were about as close to perfect as a March half marathon gets, and Hellen Obiri made full use of them. The 36-year-old from Boulder held 1st among women from the very first split and never relinquished it, averaging 5:05 per mile across 13.1 miles from Prospect Park to Central Park. Her 5K→10K segment was the fastest women's split on that stretch of the course — a mid-race statement that left no doubt about the outcome.

Behind Obiri, Sullivan ran a composed and quietly impressive race. Starting 11th among women, the Reston, VA native posted the 7th-fastest women's 5K→10K split and worked her way to 9th in the women's field by the finish — good for 2nd in the W35-39 group in 1:09:38. Lindsay Flanagan of Superior, CO rounded out the podium in 1:14:02, holding a consistent position in the women's field from early on and finishing 19th among all women.

The battle for 4th and 5th was the most compelling subplot in the age group. Kerry Allen (Washington, DC) and Lauren Philbrook (Hamilton, NY) were separated by just 37 seconds at the line — Allen's strongest segment came on the 15K→20K stretch, where she posted the 21st-fastest women's split, while Philbrook had been the quicker of the two through the 5K→10K stretch. Neither gave much ground in the closing miles. Behind them, six more W35-39 runners finished between 1:18:46 and 1:21:12, with Allison Baum, Jeanne Mack, Stephanie Muscat, Mollie Ferro-Hart, and Hope Luebbert all within three minutes of each other — a testament to how competitive the middle of this 2,037-finisher age group truly was.