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A view-filled tour from Aspen to Snowmass and back, via Sky Mountain Park.

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8,626' 2,629 m


7,608' 2,319 m


1,948' 594 m


1,948' 594 m



Avg Grade (2°)


Max Grade (11°)

Dogs No Dogs

E-Bikes Not Allowed

Portions of this loop include Sky Mountain Park. SMP is closed to recreation use for wildlife from December 1 to May 15 (reopening May 16). Dogs are strictly prohibited in Sky Mountain Park (including Airline Trail, Deadline Trail, Cozyline Trail, Skyline Ridge Trail, Viewline trail, Ditchline Trail, and Seven Star Trail). No motorized vehicles allowed. Deadline Trail is down-hill travel only.


This suggested loop ride takes in the singletrack and huge views of Sky Mountain Park. SMP is a recently acquired open space property that includes the ridge line between Brush and Owl Creeks, offering views towards Aspen, Independence Pass, Snowmass, 14ers of the rugged Elk Mountain range, and down valley views towards Mount Sopris and Basalt Mountain. The trails on this property are mostly new, with trail improvements ongoing.

The mapped route and the following description includes different routes to and from the base of Buttermilk Ski Area and the Owl Creek bike path which will lead you to Sky Mountain Park.

The loop around Sky Mountain Park and Owl Creek is described in a counter-clockwise direction so that the directional Deadline Trail can be incorporated, but most of these trails can otherwise be ridden in either direction.

Need to Know

This loop ride is described as starting and ending at Buttermilk Ski Area's parking lot. By studying the maps, you can certainly start from downtown Aspen, and you can easily design this loop ride to work from parking areas at the Highway 82 / Brush Creek Rd. Intercept Lot, or from the Rodeo Lot in Snowmass Village.

Be aware of getting caught out in late afternoon thunderstorms; most trail rides in Sky Mountain Park require using the Skyline Ridge Trail which can be a very exposed place during lighting storms.


From Buttermilk Ski Area parking lot, jump onto the Buttermilk Connector trail (completed fall 2015), which will lead you to the adjacent paved Owl Creek Trail which similarly parallels the Aspen Airport runway. About a hundred yards after the bike path veers away from the runway and starts to climb, make a right onto Airline Trail where, soon enough, the real climbing begins.

As you climb up Airline Trail, you might want to ring your bell as you approach blind corners. While uphill riders have the right of way, you'll likely encounter some trail traffic on this popular flowy trail. At the intersection with Cozyline Trail, (a good place to pause for a breath and the view), make a left and continue the climb up to Skyline Ridge Trail. Once on the ridge trail, its worth stopping to enjoy the huge views in all directions. Eventually, you'll arrive at the start of the Deadline Trail on your left. If for some reason you don't want to roll down the berms, jumps and rollers of this trail, you could shortcut this loop a bit and descend down Viewline trail, but that is no longer the recommended downhill for bikes.

After enjoying Deadline, make a hard uphill left onto Highline trail. After a fast traverse, make a right turn to join Lowline Trail, which will loop you all the way back to Highline trail. Soon you'll find yourself near the base of Viewline trail and a map/kiosk that can help to orient you. Jump on to the Ditchline Trail for a bonus bit of singletrack, this will lead you to the paved Brush Creek Bike Path. Make a right on the path and push a big gear down the valley, all the way down to the start of the Cozyline Trail.

Find Cozyline just after the path crosses the creek with a large truss bridge. The climb up Cozyline can feel steep at times, but the grade relaxes quite a bit as you get higher up, especially as you approach the conclusion of the actual loop. Make a hard left onto Airline Trail, where it's time for the great descent back down to the paved Owl Creek Trail. Enjoy a final section of new modern bike-optimized singletrack by jumping back onto the Buttermilk Connector for your final mile back to your start at the parking lot for Buttermilk Ski Area.


Shared By:

Mike Pritchard with improvements by Taz Brown and 1 other

Trail Ratings

  4.5 from 23 votes


in Aspen


  4.5 from 23 votes
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9 Views Last Month
20,385 Since Jul 6, 2015
Intermediate Intermediate



Feeling the Flow on Deadline
Aug 20, 2018 near Snowmas…, CO
Topping out on the Skyline Ridge trail in Snowmass, CO.
Jul 23, 2016 near Snowmas…, CO
360 views of the valley from Skyline Ridge
Aug 20, 2018 near Snowmas…, CO
berms galore make this a great downhill
Aug 21, 2018 near Snowmas…, CO
Riding the ridge towards Snowmass.
Oct 2, 2023 near Snowmas…, CO
Fast descending on the upper section of Cozyline Trail, Skyline Ridge Trail follows the near horizon.
May 23, 2014 near Snowmas…, CO


Current Trail Conditions

All Clear 31 days ago
Add Your Check-In


Jul 12, 2024
Private User
Sep 3, 2023
Dwight Swaney
Aug 6, 2023
John Weatherley
Jun 24, 2023
Peter Byrne
Jul 23, 2022
Private User
Sep 22, 2020
Floh Wasko
Sep 11, 2020
Kendall Beggs
Really great trails. Smooth, flowy, fast, maybe the best system I've ever rode. 21mi — 2h 40m
Jul 15, 2020
Nicholas Sidikovich
Wonderful loop. I loved it. 19.2mi — 2h 36m

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