F18-20 at Napa Valley Half Marathon: Adamson pulls clear in the back half

• Blayney Adamson won the F18-20 race in 2:04:27 (9:30/mi), climbing from 471st to 397th among women on the final stretch with the 328th-fastest women's split on the 6.9M–Finish segment.
• The gap from 1st to 2nd was 7:19 — Adamson was never seriously threatened once the second half played out.
• Abigael Welch held 2nd in 2:11:46 (10:03/mi), while Madison Kim finished 3rd in 2:16:55 (10:27/mi) — a 5:09 gap between them.
• Emily Rich rounded out the four-woman field in 2:28:34 (11:20/mi), nearly 12 minutes behind Kim.

Four women toed the line for F18-20 on a cold, damp Napa morning — 37°F, 87% humidity, and barely a breath of wind. Blayney Adamson of Saint Helena set the tone early and never let up. By the time the field hit the 6.9-mile mark, she was already well clear, and her closing split — 328th-fastest among all women on that final stretch — confirmed she was still pressing, not coasting. She crossed in 2:04:27, running a 9:30/mi average that left the rest of the field well behind.

Abigael Welch of Pleasantville took 2nd in 2:11:46, though her second half told a different story than Adamson's surge. Where Adamson moved up 74 spots among women from 6.9 miles to the finish, Welch slipped six places, finishing with the 542nd-fastest women's split on that segment at a 10:03/mi average. She held on comfortably enough for the runner-up spot, but the gap to Adamson stretched to 7:19 by the tape.

Madison Kim of Napa finished 3rd in 2:16:55 — a 10:27/mi effort — though her back half saw her slide from 526th to 624th among women, the steepest fade in the group on that closing stretch. Emily Rich of Twain Harte completed the field in 4th at 2:28:34 (11:20/mi), dropping further among the women's field as the miles added up. In a small but competitive group of young runners, Adamson's ability to keep pushing through the cold and the back half made her the clear story of the morning.