San Francisco Marathon 2025: Tamlyn Schafer Leads the NB25-29 Field Through the Fog

• Tamlyn Schafer wins NB25-29 in 3:43:15 (8:31/mi), posting the 5th-fastest women's split on the 10.87 Miles→Garmin Hill Challenge segment.
• Mariana Duenes Gomez runs a strong 3:59:16 (9:08/mi), climbing from 11th to 7th among women and recording the 6th-fastest women's split on the Garmin Hill Challenge→14.95 Miles stretch.
• A 16-minute gap separates 2nd from 3rd, with Alejandro Pelcastre-Ramirez (4:58:54) and Alexandra Ruiz (5:07:28) trading positions through the back half before finishing 3rd and 4th.
• Sean McCarthy and Sage Matthew Larson round out the six-finisher field at 5:08:10 and 5:15:41 respectively, separated by 7:31.

In cool, damp conditions — 56°F and 93% humidity under San Francisco's overcast skies — Tamlyn Schafer ran a composed and controlled race from start to finish. She entered the women's field at 7th place by the first checkpoint and moved to 6th by the second, then held that position for the remainder of the 26.2 miles. Her 3:43:15 finish at an 8:31/mi average was the clear class of NB25-29, and her 5th-fastest women's split through the Garmin Hill Challenge segment showed she didn't just survive that iconic climb — she attacked it.

Mariana Duenes Gomez told the race's best comeback story in the group. Starting 11th among women, she was still 12th at the second checkpoint before steadily working her way forward — 10th, then 9th, then 8th, then 7th — finishing in 3:59:16 at 9:08/mi. Her 6th-fastest women's split on the Garmin Hill Challenge→14.95 Miles stretch was the engine of that climb through the field. The 16-minute gap between her and Schafer reflects genuinely different paces, not a close race for the top spot.

The battle for 3rd and 4th played out over the final miles between Alejandro Pelcastre-Ramirez and Alexandra Ruiz, who tracked each other closely all race long. Pelcastre-Ramirez finished in 4:58:54 (11:24/mi) and Ruiz in 5:07:28 (11:44/mi) — a 8:34 gap at the line. Sean McCarthy, who had run as high as 13th among women at the midpoint, faded through the second half and finished 5th in NB25-29 at 5:08:10, just 42 seconds behind Ruiz. Sage Matthew Larson closed out the six-person field in 5:15:41.