Results/Photos

Date: Sept. 27, 2026 Participant: Alexander Henderson #32741 Race: 2026 Boulderthon 10K Distance: 6.2 miles

Sub-44 10K Puts Denver Runner in the Top 2% Alexander Henderson ran 43:51 at the 2026 Boulderthon 10K, finishing 58th overall and 43rd among men out of a field of 3,071. He was fifth in the men's 25-29 division. Henderson's opening 3 miles were his sharpest, covering that stretch in 20:34 at roughly a 6:51 pace. He held steady through mile 5, clocking a fastest split of 6:39 there, before easing to 7:49 over the final mile as he crossed into downtown Boulder to finish on the Pearl Street Mall. Given Boulder's elevation above 5,000 feet, his early pace held up well before the late fade.