Results/Photos

Date: Sept. 27, 2026 Participant: Grubby Hay-Arthur #13007 Race: 2026 Boulderthon Marathon Distance: 26.2 miles

Steady Early Pace Fades Over Final Miles Grubby Hay-Arthur finished the marathon in 4:07:59, an overall pace of 9:27 per mile. Through the first 18 miles he ran a tight, controlled effort, with splits ranging from 8:11 to 8:51 per mile and cumulative pace holding near 8:30 for most of that stretch. From mile 19 onward the pace slowed steadily, with splits climbing into the 10- and 12-minute range, pulling his overall elapsed pace back to 9:27 by the finish on the Pearl Street Mall. His strongest mile-plus stretch came from miles 9 through 15, where splits stayed between 8:05 and 8:51, capped by a fastest mile of 8:05 at mile 15. That consistency came at Boulder's elevation of over 5,000 feet, making the early pace all the more notable before the late-race slowdown.