The traditional Leadville Trail 100 Run course, most recently run in 2025 and described in the race's own (stale, still-live) '2025 RACE WEEK RUNDOWN' page block and its packing-list page. Out and back from 6th & Harrison in Leadville, over Mayqueen (mile 12.4), Hagerman Pass Road, Sugarloaf Mountain and the Powerline climb to Outward Bound, Half Pipe, Twin Lakes Village, and twice over Hope Pass to the Winfield turnaround. NOT run in 2026: Hagerman Pass Road, Sugarloaf Mountain and Powerline are inside the Willow Fire burn area and closed for the foreseeable future, so the 2026 race instead uses the rerouted course filed separately in this same edition (is_offered: true).
A 99.7-mile out-and-back trail ultramarathon starting and finishing at the corner of 6th Street and Harrison Avenue in Leadville, Colorado, out to a turnaround at Winfield and back, crossing Hope Pass (12,500 ft) twice. Starts at 4:00 a.m. with a 30-hour limit; sub-25-hour finishers earn the big belt buckle, sub-30-hour finishers the small buckle.
First held in 1983 as the 'Race Across the Sky,' created by local miner Ken Chlouber with Merilee Maupin to bring tourism and economic revival to Leadville after the closure of the Climax Mine. 45 runners started the first race. It grew into the Leadville Race Series, which now also includes the Leadville Trail 100 MTB, Silver Rush 50, Leadville Trail Marathon & Heavy Half, Leadville 10K and the Leadville Stage Race. The Leadville Trail 100 Legacy Foundation, a nonprofit created by Chlouber and Maupin in 2002, funds community needs and an annual $2,000 scholarship to graduating Lake County High School seniors.
| Mile | Station | Cutoff | Crew | Bag | Pacer | Med | To next |
|---|---|---|---|---|---|---|---|
| 0.00 | Start / Finish (6th St & Harrison) | ? | ? | ? | ? | ? | 12.40 |
| 12.40 | Mayqueen | 7:45am | ● | ● | ? | ? | 10.90 |
| 23.30 | Outward Bound | 10:00am | ● | ● | ? | ? | 5.90 |
| 29.20 | Half Pipe | 11:30am | · | ● | ? | ? | 8.70 |
| 37.90 | Twin Lakes Village | 1:30pm | ● | ● | ? | ? | 5.20 |
| 43.10 |
Hope Pass (outbound)
12,526 ft
|
4:00pm | · | · | ? | ? | 6.70 |
| 49.80 | Winfield | 6:00pm | · | ● | ? | ? | 6.90 |
| 56.70 |
Hope Pass (inbound)
12,526 ft
|
? | · | · | ? | ? | 5.10 |
| 61.80 | Twin Lakes Village (inbound) | 10:15pm | ● | ● | ● | ? | 8.50 |
| 70.30 | Half Pipe (inbound) | 1:15am | · | ● | ? | ? | 5.90 |
| 76.20 | Outward Bound (inbound) | 3:00am | ● | ● | ? | ? | 11.00 |
| 87.20 | Mayqueen (inbound) | 6:30am | ● | ● | ? | ? | 12.50 |
| 99.70 | Finish (6th St & Harrison) | 10:00am | ? | ? | ? | ? | ? |
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