Sky Mountain Park — Cozyline to Deadline
Jul 9, 2025
Aspen,CO
Mountain Bike
About
Conquer Thrilling Descents and Scenic High-Alpine Trails in Aspen’s Premier MTB Race
Experience an exhilarating mountain bike race through Aspen's famed Sky Mountain Park, where riders tackle challenging climbs, fast-flowing descents, and spectacular vistas. Held on July 9, 2025, this event invites cyclists to test their endurance and skills across some of Colorado's best singletrack trails, weaving through lush high-altitude meadows and rocky technical sections.
COURSE DETAILS
The race course links together the Cozyline, Skyline, Deadline, and Highline trails in Sky Mountain Park. Riders can choose between a long course (two laps) or a short course (one lap), both starting and finishing at the Brush Creek & Hwy 82 Park & Ride in Aspen.
Race HIGHLIGHTS
- Downhill-only Deadline Trail featuring berms, rollers, and jumps
- Challenging Cozyline and Skyline trail climbs
- Long course covers additional mileage and double the elevation challenge
- Panoramic views of Brush Creek Valley and Elk Mountains
- Well-organized wave starts for various rider categories
- Popular event for both serious racers and recreational riders
RIDE TYPES

Race overview
Long course: two laps of the park’s main loop (distance varies seasonally but is typically between 9–18 miles); short course: one lap.
Aspen elevation: approximately 8,000 ft; elevation gain: significant, with substantial climbs via Cozyline and Skyline trails.
Primarily technical singletrack with flow sections, bermed downhill trails, rocky climbs, and open meadows.