Results/Photos

Date: Sept. 27, 2026 Participant: Sean Mcdonough #11622 Race: 2026 Boulderthon Marathon Distance: 26.2 miles

Sean Trims 21 Minutes Off Last Year's Marathon Sean Mcdonough ran 4:15:56 at the 2026 Boulderthon Marathon, improving on his 2025 finish of 4:37:31 by more than 21 minutes. His overall pace tightened from 10:35 to 9:46 per mile, and he moved up from 1052nd to 611th overall, and from 756th to 472nd among men. The race unfolded as a strong, even first half: through mile 15, Sean held between 8:33 and 9:12 per mile, reaching the halfway point near 8:49 overall pace. That opening stretch from miles 1 to 15 was his most consistent of the day, holding tightly to 8:40s-8:50s pace. The back half cooled gradually, with miles 16 through 22 settling into the 10:00-12:40 range as cumulative pace drifted from 8:57 to 9:33. He steadied again over the final miles, closing with a 10:15 split into downtown Boulder's Pearl Street Mall finish.