MTB Project Logo

Amazing traverse on high alpine singletrack. A new, but classic, Sun Valley Ride.

Your Rating: Rating Rating Rating Rating Rating      Clear Rating
Your Difficulty:
Your Favorites: Add To-Do · Your List
Zoom in to see details
Map Key






9,537' 2,907 m


7,908' 2,410 m


2,110' 643 m


1,416' 432 m



Avg Grade (4°)


Max Grade (10°)

Dogs Unknown

E-Bikes Allowed

The Ketchum Ranger District has completed the reconstruction of the trail, which was severely damaged during the 2013 Beaver Creek Fire and subsequent storms. The trail is open.


Begin this amazing alpine trail by shuttling a vehicle or catching a ride to the end of Baker Creek Road FS162. Climb up from the trailhead for a couple miles as the trail heads up Lost Shirt Gulch to the ridge. The higher you get the better the views get.

Once on the ridge the trail climbs and descends many times. There are a lot of uphills heading west to east, but overall you are losing elevation, so you get a lot of fun descending in. Some people have gone so far as to call it a "never ending descent back down towards Ketchum," but that might be a bit overstated.

The trail is well designed and a pleasure to ride on. Continue east on the main ridgeline trail - stay on the main trail, as some intersections are reached and signs have not yet been replaced following the fire.

The Osberg Ridgeline Trail intersects with the Adams Rib Trail near the east end of Osberg and near to Fox Peak. You can continue east on the Adams Rib Trail #142 back into Ketchum/Sun Valley, or take one of the two connector trails north to the East Fork of Baker Creek Road.

"Despite being in the middle of pristine nothingness, the new Osberg trail rides like a loopy little excursion next to town. Uniquely, the trail does not torture you with a climb that lasts for hours before sending you down the other side like most trails in Sun Valley. It follows a ridge system, popping in and out on each side slapping you with show-stopping views which make riding at anything other than a stop and go pace almost impossible. As it rolls along, Kodak moments inhibit progress, but we are not in a hurry. Each stop results in another telling of some tale from the road or reminiscing over our many rides past. Despite the mellow terrain, nearly everyone takes a soil sample resulting in arm or leg jerky, but no one seems to care. It is a perfect day for the perfect ride. Whoops can be heard in the woods, and at each stop high fives are thrown all the way around."

- From an article on the trail by Greg Randolph, Sun Valley Tourism


Shared By:

Jordan Carr

Trail Ratings

  4.3 from 19 votes


  4.3 from 19 votes
5 Star
4 Star
3 Star
2 Star
1 Star
Trail Rankings


in Idaho


21 Views Last Month
11,628 Since May 1, 2014
Intermediate/Difficult Intermediate/Difficult



Summertime wildflowers on Osberg Ridge... so awesome!
Aug 16, 2018 near Ketchum, ID
The burn area has created new opportunities for wildflowers, and it's a pretty amazing landscape to ride through.
Aug 16, 2018 near Ketchum, ID
Dropping off the high point at 9500 feet. What follows is one of the more enjoyable descents in the Ketchum area.
Oct 9, 2016 near Sun Valley, ID
Suffering up the climb!
Aug 22, 2019 near Ketchum, ID
The flowers can be amazing mid-summer in the burned areas.
Oct 9, 2016 near Sun Valley, ID
All kinds of trail conditions this day!  Early September 2016.
Sep 14, 2016 near Ketchum, ID


Current Trail Conditions

Add Your Check-In


Sep 21, 2022
Brenna Peloquin
Summer 2022
Jul 29, 2020
Eric Compas
Jul 18, 2020
Brad Mathews
This is an epic ride. The scenery is exceptional! The lengthy downhill back to town via Adam's Rib is more work than expected. Take more water. 26.3mi — 5h 30m
Aug 22, 2019
Keith Davis
Aug 25, 2018
Carl Shuptrine
Very technical 10.9mi
Sep 13, 2017
Jennifer Belknap
Aug 4, 2017
Cameron Nolen
Aug 4, 2017
Paul Lindfield

Join the Community

Create your FREE account today!
Already have an account? Login to close this notice.

Get Started