SF Marathon 10K: Mark Carlson Owns the NB40-44 Field

• Mark Carlson, 42, wins NB40-44 with a finish time of 1:16:53.
• Solo effort: Carlson was the only finisher in the NB40-44 field, making this a race against the clock and the city.
• Pace: He covered the 10K course at 12:22 per mile through San Francisco's cool, humid Sunday morning.

Mark Carlson had the NB40-44 race entirely to himself on July 24th, and he made it count. The 42-year-old San Francisco local crossed the line in 1:16:53 — no rivals, no drafting, no one to chase. Just Carlson, the fog, and 6.2 miles of San Francisco streets.

The conditions were classic Bay Area: 55°F, 93% humidity, and a barely-there 2 mph breeze under overcast skies. Not brutal, but not fast either. At 12:22 per mile, Carlson worked through every block of it and brought home the only NB40-44 result of the day — which, by definition, also makes it the win.