F30-34 Half Marathon: Grimshaw dominates, Blum storms the back half

• Jenny Grimshaw won the F30-34 race in 1:15:14 (5:44/mi), holding 2nd among all women from start to finish and posting the 2nd-fastest women's split on the 3.1M–6.9M segment.
• Bridget Blum climbed from 7th to 5th among women by the finish, running the 4th-fastest women's split on the 6.9M–Finish stretch to claim 3rd in F30-34 in 1:18:43.
• Sara Passani (2nd, 1:17:29) and Jocelyn Todd (4th, 1:19:49) each posted top-8 women's splits on the middle segment — separated by 2:20 at the line.
• Places 13–17 were decided in a 25-second window: Rachel Morris (13th, 1:28:10) through Breanna Lytton (17th, 1:28:35) ran 6:44–6:45/mi and finished in a tight cluster across 294 finishers.

Jenny Grimshaw ran the F30-34 race the way you'd draw it up — locked into 2nd among all women by the first checkpoint and never budging, sustaining a 5:44/mi average across 13.1 miles in cool, breezy Napa conditions to win in 1:15:14. Her middle segment, from 3.1 to 6.9 miles, was the 2nd-fastest women's split on that stretch in the entire field — a clear signal that she wasn't just holding position, she was pressing it.

Sara Passani (1:17:29, 5:55/mi) kept pace with Grimshaw's position through the middle segment — 4th-fastest among women from 3.1 to 6.9 miles — and finished 2:15 back to take 2nd in F30-34. Bridget Blum tells a different story: she started 7th among women and worked her way to 5th by the finish, fueled by the 4th-fastest women's split on the back half of the course. Her 1:18:43 (6:00/mi) was good enough to leapfrog Passani for 3rd — a back-half move that earned it. Jocelyn Todd (4th, 1:19:49) and Sarah Gulli (5th, 1:20:26) rounded out a sharp top five, all finishing under 6:10/mi.

Further back, the race produced one of its most competitive stretches in the 13th-through-17th slots, where five runners — Rachel Morris, Jacqueline Rosenberg, Rae Brookshire, Claire Puttock, and Breanna Lytton — finished between 1:28:10 and 1:28:35, all running 6:44–6:45/mi. Twenty-five seconds covered five athletes out of 294 finishers. In a field that deep, every second of that stretch was contested.