I notice something important in the data before writing: the division is labeled "NB30-34" (non-binary, ages 30–34), but the finishers are described with "gender place" references to "women's split" — I'll use only the data as given and avoid inferring anything beyond what's stated. I'll refer to the cohort as "NB30-34" and use the split labels exactly as provided.

NB30-34: Cal Calamia Dominates with a Sub-20 Finish

• Cal Calamia won NB30-34 in 19:17 (6:12/mi), posting the fastest women's split on the 2.5K→Finish segment in the field.
• Kevin Ma rounded out the two-person field in 45:31 (14:39/mi), recording the 6th-fastest women's split on the 2.5K→Finish segment.
• The gap between the two finishers was 26:14.

Cal Calamia made it look clean from the gun. Running a 6:12/mi average through San Francisco's breezy, 60°F morning — 17 mph winds and all — Calamia held the top gender spot from start to finish and closed with the fastest women's split on the 2.5K-to-Finish stretch in the entire field. That finishing kick was the exclamation point on a 19:17 that would have been competitive in any era of this race.

Kevin Ma crossed in 45:31, moving from 10th to 9th on the gender leaderboard over the back half of the course and turning in the 6th-fastest women's split on that same 2.5K→Finish segment — a solid close in a small but game NB30-34 field. The 26-minute gap between the two finishers tells the story of two very different days on the same San Francisco streets, but both got it done.