M18-19 at Leadville 100: Osburnsen outlasts Denicke in a teenage battle across the sky

• Maden Osburnsen wins M18-19 in 26:56:29 (16:10/mi), finishing inside the 30-hour buckle window by more than three hours.
• Orion Denicke earns 2nd in 27:35:05 (16:33/mi), also well within buckle territory — the two 18-year-olds separated by 38 minutes 36 seconds.
• Denicke posted the 55th-fastest men's split in the field on the 52.3M→59.1M segment; Osburnsen countered with the 64th-fastest men's split on the 40.5M→45.6M stretch — both showing genuine speed at key moments across the back half.
• Together, these two teenagers completed one of ultrarunning's most demanding 100-milers — 100 miles through the Colorado Rockies at elevations reaching 12,500 feet — and both earned their buckles.

Two 18-year-olds. One hundred miles. Somewhere between 9,400 and 12,566 feet above sea level. The M18-19 field at the 2026 Leadville Trail 100 was small in number but enormous in ambition, and both finishers delivered.

Maden Osburnsen of Colorado Springs took the win in 26:56:29, averaging 16:10 per mile across the full distance. His movement through the men's field tells its own story: he started cautiously — 273rd among men at the first checkpoint — then climbed steadily to 124th by the finish, a relentless upward march through the broader field. His fastest registered split, the 64th-quickest among all men on the 40.5M→45.6M segment, came at a stretch where many runners begin to feel the accumulated toll of the early miles and the double crossing of Hope Pass.

Orion Denicke of Wildwood, Missouri ran a different kind of race. He entered the men's field faster — 167th at the opening checkpoint — but traded places more fluidly through the middle miles before settling at 145th at the finish. His standout moment came on the 52.3M→59.1M segment, where he posted the 55th-fastest men's split in the entire field — a genuine surge deep into the race's second half. At 16:33/mi overall, he ran 23 seconds per mile slower than Osburnsen, and that gap compounded over 100 miles into a 38-minute margin. Both men crossed the line in under 27:35 — and both go home with a Leadville belt buckle.