Men's Half Marathon: Kowada's second-half surge seals a weekend double

• Hibiki Kowada won in 1:16:51 (5:52/mi), posting the fastest men's split on the second half to overturn a mid-race deficit and claim the title.
• Zac Grissom finished 2nd in 1:17:19 — just 28 seconds back — while Ryan Chen, 18 years old, ran 3rd in 1:18:12 to complete a podium that spans just 81 seconds.
• Kowada also won the Saturday 5K earlier in the weekend — a genuine double across two races at the same event.
• Alex Yoshino (16) and Isaac Albert (16) finished 11th and 15th respectively, both at 6:20/mi, in a men's field of 3,619.

Hibiki Kowada's win was anything but straightforward. Running out of Shibuya, Japan, he sat as low as 6th among the men at multiple checkpoints through the middle miles — patient, or perhaps biding his time. Then came the second half of the course, where he posted the fastest men's split of anyone in the field on that stretch, vaulting from 6th all the way to 1st and crossing in 1:16:51 at 5:52/mi. That's a decisive move when it counts most, on a San Francisco course that gives nothing away at 59°F with a stiff 14 mph wind off the Bay.

Zac Grissom, 25, was the runner-up story in his own right. He ran the 5th-fastest men's split in the 2M–4M stretch and had worked his way to 2nd by late in the race, finishing in 1:17:19 — close enough to make it interesting, but Kowada's second-half gear was the difference. Ryan Chen is the name to underline in the results: at just 18 years old and out of Sunnyvale, he ran the 2nd-fastest men's split in the 9.6M–10.5M segment, held his composure, and landed on the podium in 1:18:12. Andrew Kohn (4th, 1:20:30) and Sarung Tripathi (5th, 1:20:50) rounded out the top five with strong late-race splits of their own — Kohn's 12M-to-finish was 6th-fastest among the men.

The bigger story, though, belongs to Kowada's weekend. Winning the Saturday 5K and then backing it up with a half marathon title two days later is the kind of double that demands its own sentence. Two races, two wins, one weekend in San Francisco.