San Francisco Half Marathon: Arroyo Takes the Women's Crown

• Allison Arroyo finished in 1:57:31 (8:58/mi), claiming 1st place among the women.
• Sana Alsamman completed the course in 2:40:15 (12:13/mi), finishing 2nd.
• The gap between the two finishers was 42 minutes and 44 seconds.

Allison Arroyo, 50, from California, owned this race from start to finish, crossing in 1:57:31 at an 8:58/mi clip. Her checkpoint data tells a story of a racer who moved fluidly through the women's field — entering the 5.7M–6.43M segment with enough in the tank to post the 221st-fastest women's split on that stretch, a strong showing in what is typically a demanding mid-race stretch in San Francisco's rolling terrain.

Sana Alsamman, 25, of Fair Oaks, CA, ran her own race at the back of this two-person field, finishing in 2:40:15 at 12:13/mi. Her checkpoint progression showed steady movement through the women's field — she climbed from a deep position early, posting her strongest relative split on the 2.2M–5.7M segment (1,217th-fastest among women), before settling into a consistent pace through the final miles. Finishing 2nd in a field is still finishing, and in the damp 54°F fog of San Francisco, completing 13.1 miles is no small thing.

The 42:44 gap between them reflects two very different races run on the same course — Arroyo commanding at the front, Alsamman grinding out her own journey to the finish line on a cool, humid July morning by the Bay.