SF Marathon 5K — NB25-29: Ontiveros Claims the Division

• Anabel Ontiveros, 28 (Oakland), wins the NB25-29 race in 38:09 (12:17/mi avg).
• Skye Gulden, 27 (San Carlos), finishes 2nd in 41:57 (13:30/mi avg).
• Ontiveros held a 3:48 margin over Gulden at the finish line.

The NB25-29 field at the 2023 San Francisco Marathon 5K brought two finishers to the fog-cooled streets — 57°F and overcast, with a light breeze off the bay — and Anabel Ontiveros made the most of the conditions. The 28-year-old from Oakland crossed in 38:09, averaging 12:17 per mile to take the win outright.

Skye Gulden, 27, of San Carlos gave chase but couldn't close the gap, finishing in 41:57 at a 13:30-per-mile clip — a notably slower pace than Ontiveros that tells the story of a race where the lead was never seriously threatened. The 3:48 separating them at the finish is a comfortable, decisive margin in a 5K.

In a two-person field, every place matters, and Ontiveros delivered a clear, measured effort to stand atop the NB25-29 podium. Gulden's 41:57 earned her a hard-fought 2nd — no small thing on San Francisco's demanding terrain.