Results/Photos

Date: Sept. 27, 2026 Participant: Coleman O'Brien #41566 Race: 2026 Boulderthon 5K Distance: 3.1 miles

A Fast Middle Mile Anchors a Solid 5K Coleman O'Brien finished the 2026 Boulderthon 5K in 28:36, an overall pace of 9:13 per mile. O'Brien opened with a 9:07 first mile before surging to a 7:58 second mile, his strongest stretch of the race. The closing mile slowed to 10:41, settling his overall pace back near his opening rhythm. That middle-mile push stands out as the highlight of his race, showing a strong gear he can look to sustain for longer next time. Finishing in downtown Boulder on the Pearl Street Mall, O'Brien completed the race at over 5,000 feet of elevation, a notable backdrop for his effort.