Rockstacker and Jackson ST
The Rockstacker and Jackson Singletrack Trails are highly technical singletrack that form a downhill route from the Pothole Arch Trail at the top of Amasa Back. Rockstacker is 1.7 miles long; Jackson is 2.2. There's a fair amount of uphill climbing and some very dangerous spots on the downhill. Some areas are potentially deadly and should be carefully walked, not ridden. Only true experts should attempt this ride.
Riding notes, Amasa to Pothole Arch to Rockstacker to Jackson:
0.0   Exit parking, uphill on road N38 31.710 W109 35.705
0.6   Drop R off road N38 31.435 W109 36.096
0.8   Cross creek N38 31.589 W109 36.080
2.8   Top of climb, for now N38 31.079 W109 37.115
3.5   Pass Portage connector, keep straight
N38 31.721 W109 37.678
3.7   Keep L at fork to Jackson ST
N38 31.761 W109 37.756
4.4   Keep L on Amasa at Pothole fork
N38 31.876 W109 38.369
5.1   View - End of Amasa - backtrack
N38 31.678 W109 38.871
5.8   Back at Pothole Arch Trail , fork L
6.2   Alternate joins on L, unmarked
N38 32.047 W109 38.661
7.0   Keep L and straight (R=Rockstacker)
N38 32.533 W109 38.449
7.8   R 100 ft to Pothole Arch N38 33.115 W109 38.447
then back and go north
8.0   Viewpoint, turn around N38 33.228 W109 38.545
9.0   Back at fork. Go R on Rockstacker !
N38 32.533 W109 38.449
9.1   First scary plunge. Yikes!
10.9   Junction with Jackson ST, keep L
N38 31.748 W109 37.594
(R = 0.1 mile climb to Amasa, bailout!)
11.8   Cliff exposures. Walk, you fool!
12.8   At Kane Creek, turn R along creekside
N38 31.935 W109 36.152
13.0   Cross creek, go left N38 31.904 W109 35.947
13.1   At Kane Springs parking area
N38 31.945 W109 35.948
R uphill on road
13.6   Back at parking
Getting there: Head south on Moab's Main Street. When you reach the McDonald's, turn right onto Kane Creek Blvd. After 0.6 miles, go straight as the road turns right (500 West). Drive along the Colorado River about 5 miles until the road turns to gravel, and head uphill about 2/3 mile. Watch for the "Amasa Back Parking" area at GPS N 38° 31.329' W 109° 35.501'.

Copyright 2011 Mad Scientist Software Inc
Trail conditions change, and the layout of a trail may change without notice. Use this trail guide at your own risk.
This is a dangerous route with significant
potential for death or serious injury!