San Francisco Half Marathon 2023: Cameron Slovic Dominates M25-29

• Cameron Slovic won M25-29 in 1:19:16 (6:03/mi), posting the 3rd-fastest second-half split among all men in the race.
• Nima Leclerc (1:22:02) held 2nd by 2:46 over Todd Macdonald (1:24:26), with the top three all finishing inside 6:30/mi pace.
• Places 4 through 10 were separated by just 3:37, from Erik Spangberg's 1:27:39 to Aitor Gumiel's 1:31:16.
• A field of 688 finishers in M25-29 made this one of the deepest age brackets on the course.

Cameron Slovic didn't just win M25-29 — he made it look easy in the fog and humidity of a San Francisco July morning. Starting 11th among men, Slovic steadily climbed the men's standings through the first half, reaching 6th by the midpoint, then 5th, then 4th. The decisive move came on the second half: he posted the 3rd-fastest second-half split among all men in the race, moving to 3rd overall among men by the finish line and crossing in 1:19:16 at a brisk 6:03/mi. That's a full 2:46 clear of the next M25-29 finisher — a dominant margin at this level.

Nima Leclerc ran a strong front-loaded race, recording the 6th-fastest first-half split among all men and holding 2nd in M25-29 with a 1:22:02 (6:15/mi). He faded slightly in the men's standings during the second half, slipping from 4th to 6th overall among men, but his early pace banking was more than enough to hold off Todd Macdonald, who ran the opposite strategy. Macdonald (1:24:26, 6:26/mi) started 14th among men and climbed steadily to 11th by the finish, posting the 10th-fastest second-half men's split — a notable catch-up that wasn't quite enough to close the 2:24 gap to Leclerc.

Behind the podium, Erik Spangberg (1:27:39) and William Tran (1:28:39) ran the strongest middle-segment splits in the 6.62M–10.65M stretch among the top finishers — Spangberg posting the 18th-fastest and Tran the 22nd-fastest men's split on that stretch — to lock up 4th and 5th. The battle for 6th through 10th was tightly packed: Nick Teissler (1:29:44), Peter Mangan (1:30:42), George Chenery (1:31:05), Juan Jazo (1:31:09), and Aitor Gumiel (1:31:16) were all separated by just 1:32 across five places, a testament to the competitive depth in this M25-29 field.