Colorado ultrarunner shatters 31-year-old women’s course record at Leadville Trail 100

August 17, 2025

Records tumbled at this year’s Leadville 100. Women’s race winner Anne Flower of Colorado Springs clocked 17:58:19, shattering Ann Trason’s long-standing women’s record from 1994 (18:06:24) and placing second overall. On the men’s side, Boulder’s David Roche charged to victory in 15:12:30, chopping more than 14 minutes off his own course record from last year, a performance that erased a mark that was untouched for 19 years.

Flower, 35, turned in a standout performance in her first attempt at the 100-mile distance, building on a win at the 2024 edition of Javelina Jundred 100K and building on a strong background in shorter ultras and road marathons, according to UltraSignup. She moved into the lead before halfway and never gave it up. Imogen Ainsworth followed Flower in 19:36:42 for runner-up, with Lea Mulligan rounding out the women’s podium in 20:39:04. Running Magazine