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MULTIDAYRUNNING
Fixed-Distance

Leadville Trail 100 Run

A high-altitude Colorado classic with a 99.7-mile out-and-back course, 15,492 ft of climbing, and a 30-hour limit.

Official WebsiteBack to Events

Event dates, entry rules, qualification standards, and course details can change. Always verify current information on the official event website before registering or booking travel.

Event Overview

Listed edition overview
DateAug 22-23, 2026
LocationLeadville, Colorado, USA
FormatFixed-Distance
TerrainMountain
RegionNorth America
Distance99.7 mi
State / areaColorado (CO)
Course modelOut-and-back
Edition noteThe organizer says the 2026 race has a green light, but details remain subject to change after regional wildfire impacts.
Elevation gain15,492 ft
Cutoff30 hours
HighlightsHope Pass, Race Across the Sky

Course & Terrain

High-altitude out-and-back on forest trails and mountain roads from Leadville, reaching approximately 12,526 ft.

Entry & Logistics

Listed qualification and support details
Registration and feesCheck the official event website for current availability, deadlines, prices, taxes, and refund terms.

Why This Race Matters

Leadville Trail 100 Run is a useful reference point for runners comparing long fixed-distance ultras that still unfold over multiple days. Its format, terrain, and support model shape the kind of preparation required: not just fitness, but pacing discipline, nutrition planning, foot care, and the ability to make good decisions under fatigue.

Planning Notes

  • Prepare for sleep decisions, weather swings, and aid-station discipline. The distance is only one part of a multi-day fixed-distance race.
  • Treat intermediate cutoff gates as part of the course. Build enough margin for aid stops and late-race slowdown, and verify every current gate in the official rules.
  • Train for terrain-specific fatigue. Technical trails and mountain courses demand downhill durability, hiking efficiency, and reliable night lighting.
  • The directory does not mark this as having simpler logistics. Confirm qualification, terrain, support, registration, medical, and withdrawal requirements before planning around it.
  • Very high starting elevation
  • Fire-related details may still change

Verification & Sources

Verification scope: the listed edition's date, location, format, and available logistics were checked against the event-specific official sources below during the directory review dated August 18, 2026. Organizers can revise details after review.

  1. Official Leadville Trail 100 Run page — https://www.leadvilleraceseries.com/run/leadvilletrail100run/
  2. Multiday Running event directory review scope: August 18, 2026.