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Osberg Ridgeline #147

 4.3 (11)
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Map Key

10.9 Miles 17.6 Kilometers


2,110' 643 m


-1,416' -432 m



Avg Grade (4°)


Max Grade (10°)

9,537' 2,907 m


7,908' 2,410 m


Shared By Jordan Carr



Getting forecast...

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

Jordan Carr

Dogs Unknown

Features eMTB 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


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Your Check-Ins


Aug 25, 2018
Carl Shuptrine
Very technical 10.9mi
Sep 13, 2017
Jennifer Belknap
Aug 4, 2017
Paul Lindfield
Aug 4, 2017
Cameron Nolen
Jun 24, 2017
Brian Reese
This is a great trail! Last week of June and there are several large snow crossings and there's a good number of trees across the trail.
Sep 4, 2016
Richard Rosko
Just got a little snow dusting the night before. Made for an awesome day.
Aug 21, 2016
Matthew Brinker
Aug 6, 2016
Javier Colton

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Trail Ratings

  4.3 from 11 votes


  4.3 from 11 votes
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in Idaho


122 Views Last Month
6,794 Since May 1, 2014
Intermediate/Difficult Intermediate/Difficult


The Idaho Conservation Corps (a program of the Northwest Youth Corps) has partnered with the Sawtooth National Forest and we are currently fixing the Osberg trail. Alden Gulch to Fox Peak is nearly completed and we will be working on Baker Creek/Lost Shirt Gulch to Alden Gulch over the next month. Feel free to stop in and say hey to the crews! --Jay Snowdon Program Coordinator Idaho Conservation Corps 7/14/2015 Jul 14, 2015
Tom Lee  
This description is very, very misleading. I went to do this today, riding up to Baker Creek for more likes. By the description it was a 2 hour trail. I was on it for more than four. The start is, indeed, in good condition. Buts, as you climb, you are in the burned forest, with no shade and direct sun. The climb to the summit goes up and down, clocking a lot more than 2,000 feet of climbing. But most important the quality is very low. The burned trees from 2 years ago have deposited a sand-like silica that feels like the beach. The lip/berm on the downhill side collapses if your wheel gets on it for much of the trail, and the switchback turns are really loose. The worst part is at the top. Given the fire, and then the huge snowpack of 2016-2017, after you peak you are riding down a wash with boulders the size of toaster ovens, at best. This year there have been numerous accidents with dirt bike riders who can't navigate it, and I later found most mountain bikers locally are avoiding it entirely. To categorize this as "medium" and Griffin's Butte as "medium/hard" is absurd: Griffin's Butte is far easier than this. After asking around, I was told that generally speaking trails north of the Ketchum area, with a few exceptions (like Curly's loop, or Galena which is professionally managed) are the subject of lots of injuries and rescues due to the burn/snow problem - including dirt bikers. This is no "never-ending descent to Ketchum" nor a "loopy ride" just outside town. Jul 30, 2018
Fred Pope
Avon, CO
Fred Pope   Avon, CO
Awesome trail. Great Singletrack. Incredible views. Out of this world colors. Rode as a loop from Ketchum. Great day on the bike. 5.5 hours round trip. ~50ish miles. I’d put this in my top five rides of all time. Epic. Sep 1, 2018

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