Forty miles through the heart of the San Juans with 15,000 feet of gain at altitude
Other trail races within 61 miles
The Telluride Mountain Run 40 Mile is one of the most demanding mountain ultra-distances in Colorado, delivering 15,000 feet of elevation gain across 40 miles of jeep roads, singletrack, and the infamous 'Mile and a Half of Sky' — a sharply exposed ridgeline above 13,000 feet between Ajax Peak and Imogene Pass, including the 13,500-foot summit of Telluride Peak. The 2026 course is newly redesigned to spend more time at altitude with harder peak ascents on the second half, crossing above 12,000 feet five times and above 13,000 feet twice. Race founder Dakota Jones described the redesign in three words: 'The course is really hard.'
Experienced ultrarunners
Telluride, CO, United StatesAugust 22, 2026
| Location | Mile | Elevation |
|---|---|---|
Town Park Start/Finish Start | 0.0 | 8,763 ft |
Bridal Veil Aid Station Aid Station | 11.0 | 10,302 ft |
Tomboy Aid Station Aid Station | 16.8 | 11,512 ft |
Oak Street Aid Station Aid Station | 24.0 | 8,750 ft |
Prospect Aid Station Aid Station | 28.1 | 11,161 ft |
Gold Hill Aid Station Aid Station | 32.2 | 12,175 ft |
Finish Finish | 40.0 | 8,763 ft |
Sign in to see cutoffs, crew access, drop bags, and services for every aid station.
Course reaches 13,500 ft at Telluride Peak; majority of time spent above 10,000 ft
Afternoon thunderstorms common in August in the San Juans; early 5am start designed to minimize summit exposure
Predawn and nighttime temperatures can drop sharply at altitude; warm layers strongly recommended
No required gear specified
No recommended gear specified
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