MTB Project Logo

Rocky Jackson

Very Difficult
 4.8 (9)

Link Rockstacker and Jackson for a technical and exposed loop.

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







4,871' 1,485 m


3,967' 1,209 m


1,372' 418 m


1,383' 422 m



Avg Grade (3°)


Max Grade (15°)

Dogs Leashed

E-Bikes Not Allowed


This is a classic loop linking two of the best, most technical and exposed trails in the Amasa Back area. Pick your poison on the way up: HyMasa Trail offers riders a less technical, slightly longer and purpose-built ingress while Amasa Back / Cliffhanger serves up a more direct, ledge-strewn grind. Both are fun and worthwhile! Mapped here climbing HyMasa Trail for maximum singletrack.

Cane Springs Rd. (Hurrah Pass) --> HyMasa Trail --> Amasa Back / Cliffhanger --> Pothole Arch --> Rockstacker --> Jackson

Need to Know

The creek crossing at the end can be easy or totally undoable depending on the time of year. If the water's high, make your way back up to the Amasa TH by way of the path next to the creek.


From the Jackson's Trailhead pedal up the smooth and gradual Cane Springs Rd. (Hurrah Pass). After about a mile, drop into either HyMasa Trail or take on the ledge-y drops on the Amasa Jeep roll-in.

Cross the creek and begin climbing Amasa. Soon thereafter, HyMasa Trail splits off to the right. Again, you can stay on Amasa if you want. Six of one, half a dozen of the other.

Once you reach the top of HyMasa, you'll need to bear right (away from Captain Ahab) to link up with Amasa Back. After a short little descent and one thought-provoking roll, the grade turns back uphill for the next roughly mile and a half. Pay no mind to the junction with Jackson—you'll get your chance to ride this soon enough—and enjoy kick-ass views from the edge of a nearly 1000-foot-tall cliff.

At about mile six, stay right to join Pothole Arch trail. A super short climb leads to the first truly fun descent of the ride. Bomb down slickrock, through fun turns and over a few drops as you near the top of Rockstacker. Again, stay right.

Rockstacker wastes no time getting right into it. A steep roll is followed closely thereafter by a techy uphill move with plenty of exposure to the right. Clean that and immediately roll into one of the steeper/more committing features on the whole trail. This slab roll has a couple line options so scout it out or just go for it. It's pretty smooth.

After this, keep your eyes peeled for the faint red paint on the slickrock—it's easy to feel like you've gone off-trail here, and you very well might. Consult the MTB Project mobile app if in doubt. After some up and down, with the occasional techy and steep feature thrown in for good measure, prep yourself for the exposed fun coming on Jackson.

Jackson is much more consistently downhill than Rockstacker but still has the occasional punchy uphill, so be ready. After a mile or so of traversing a sidehill that makes you feel like you're flying free above the Colorado River, the technicality and exposure bump up a notch at a steep, tight left-hand switchback. While totally rideable (stay inside), many riders will want to walk this section due to the penalty of failure (read: possibly falling off a cliff).

The toughest section of Jackson follows this switchback: a few large drops break up a fall-line section before another spicy switchback and more tight, rocky, and exposed singletrack. Once things flatten out, you've pretty much made it.


Local Club: Moab Trail Mix

Land Manager: BLM Utah - Moab Field Office

Shared By:

Brian Smith with improvements by Moab Trail Mix

Trail Ratings

  4.8 from 9 votes


in Amasa Back


  4.8 from 9 votes
5 Star
4 Star
3 Star
2 Star
1 Star
Recommended Route Rankings


in Amasa Back


in Utah


94 Views Last Month
14,299 Since Nov 6, 2017
Very Difficult



Building (and riding!) Captain Ahab
Oct 17, 2013 near Moab, UT
The final stretch of Captain Ahab is rowdy, fast and fun.
Apr 1, 2015 near Moab, UT
Hucking on the Hymasa Trail.
Apr 20, 2017 near Moab, UT
Surviving Jackson's in a snowstorm.
Jan 12, 2017 near Moab, UT
Having fun on some of the side lines on Hymasa
Nov 6, 2018 near Moab, UT
Enjoy miles of smiles on Hymasa Trail.
Feb 22, 2017 near Moab, UT



Current Trail Conditions

Add Your Check-In


Sep 25, 2020
Brendan Edwards
May 14, 2020
Ascanio Pignatelli
Thrilling the whole way
Dec 8, 2019
Ian Mitchard
Added pothole arch to the ride. Can't really say we road all of rockstacker and Jackson's. Second half of this loop gets burly for sure 13mi — 2h 30m
Nov 6, 2019
Josh Brown
super steep ultra tech
Oct 13, 2019
Tim McCabe
Apr 27, 2019
Katie Purdy
Apr 13, 2019
Clare Liu
Sep 16, 2018
Sean Casselberry
11mi — 2h 20m