Results/Photos

Date: Sept. 27, 2026 Participant: Sierra De Grasse #32807 Race: 2026 Boulderthon 10K Distance: 6.2 miles

Steady Pace Powers a Top-10% Finish Sierra De Grasse ran the 2026 Boulderthon 10K in 51:40 (8:20/mile), placing 219th overall and 71st among women in a field of 3,071. Her race opened briskly, covering the first two miles in 17:01 (8:30/mile pace), before the middle stretch introduced some variance in tempo. She answered with a strong fifth mile, clocking 7:17, the fastest full-mile split of her race, and carried that momentum to a 8:22 final mile, matching her overall pace almost exactly at the finish. That consistency between her early and closing miles both hovering near 8:20 reflects a well-managed effort across the 10K distance, run at Boulder's altitude of over 5,000 feet. With no prior Boulderthon result on record, this outing sets a clear benchmark for Sierra to build on in future editions.