F0-19 · MARATHON

F0-19: Cosgrove dominates as five young runners conquer Santa Rosa

F0-19WomenMen
By MyRace AIAugust 24, 2025Official site ↗
  • Natasha Cosgrove won the F0-19 field in 4:01:37 (9:13/mi), finishing more than 40 minutes clear of the rest of the field.
  • Emily Sheehan was the only runner in the group to move up in the women's field over the second half, climbing from 309th to 283rd among women on the 13.1M→Finish leg.
  • Just 5:23 separated 3rd-place Sheehan (4:47:51) from 4th-place Alya Madhani (5:03:52) — the closest gap on the podium outside of first.
  • All five finishers completed a full 26.2 miles in Santa Rosa's cool, misty morning conditions — no small feat for one of the youngest fields on the course.

Natasha Cosgrove, 19, from Palm Springs, made the F0-19 race her own from start to finish. Her 4:01:37 at a 9:13/mi clip left the field well behind, and her 171st-fastest women's split on the back half showed she was running with real purpose through the Sonoma County wine country. There was no drama at the front — just a composed, commanding performance.

Behind her, the race for 2nd and 3rd had a genuine subplot. Rayen Letner of Chico came in 2nd in 4:42:28 (10:46/mi), but it was Santa Rosa's own Emily Sheehan who made the more interesting move over the final half. Sheehan, 18, ran the 13.1M→Finish leg with the 263rd-fastest women's split in that stretch — faster than Letner's 319th — and climbed from 309th to 283rd among women while Letner slipped from 196th to 265th. Sheehan crossed 3rd in 4:47:51, just 5:23 behind Letner, having clearly run the stronger second half.

Alya Madhani, 18, from Redwood City, held 4th in 5:03:52 (11:35/mi), and Logan Macias of Irvine rounded out the five-woman field in 5th with a 5:16:30 finish at 12:04/mi. Completing a marathon at 19 — or 18 — in any conditions is a genuine accomplishment, and on a Boston Qualifier course known for flat, fast racing, all five earned their finisher medals the hard way.

The course

Course map — Santa Rosa Marathon
112 ft range ≈ 9 story building (12 ft each)×9174 ft62 ft013 mi26 mi
26.2 miles · 643 ft elevation gain · 174 ft max elevation
The course · start finish · © Mapbox © OpenStreetMap
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