Results/Photos

Date: Sept. 27, 2026 Participant: Antonio Castillo #22030 Race: 2026 Boulderthon Half Marathon Distance: 13.1 miles

Strong Early Pace Unravels Late Antonio Castillo finished the half marathon in 1:46:39. He opened with nine remarkably even miles, each between 6:36 and 7:09, holding a cumulative pace near 6:54 through mile 9 the standout stretch of his race. Miles 10 and 11 brought a sharp reversal, pushing his overall pace out to 8:08, before he settled into a 7:39 mile 12 and closed with an 8:35 mile to the line. That opening stretch carried him through the lululemon Power-Up Zone near mile 9.5 while still under 7:00 pace, a strong showing given Boulder's elevation above 5,000 feet. With that early speed banked, finding a touch more consistency through the middle miles could help him carry a stronger pace all the way to the Pearl Street Mall finish next time.