Bull Bottom
Bull Bottom is a slickrock ride on Navajo Sandstone along the Green River. The riding isn't particularly strenuous and you can select your ride distance to match your time and leg power. On the tech scale, this would rank as a fairly easy ride. Bull Bottom is in the middle of nowhere, 25 south of Green River via graded dirt road. There are no signs to guide you there. There's no water and no campground.
Riding notes, T-ride (mileage will vary!):
0.0   East on DT from road
N38 42.653 W110 08.776
1.4   Pass slickrock on south (right)
N38 42.687 W110 07.714
1.5   R out to viewpoint and back
North (R) on return
1.8   R off dirt onto slickrock, head NE
N38 42.760 W110 07.567
3.6   Arrive at cliffs over Green River
Turn left and uphill (before knoll!)
N38 43.655 W110 06.844
3.8   Veer left and south for return trip
5.8   Up to dirt and across DT
N38 42.703 W110 07.657
Head directly south
6.3    Route curves R, follow edge
6.9    Apex of side-canyon N38 42.850 W110 08.085
7.9    Apex 2nd side-canyon N38 42.504 W110 08.707
9.4    Apex 3rd side-canyon N38 41.740 W110 08.874
10.6  Wash, double-back N38 41.044 W110 09.048
15.4   L on DT at original T fork
16.8   Back at car
Riding notes, Northern Loop (mileage will vary!):
0.0   East on DT from road
N38 42.653 W110 08.776
1.4   Pass slickrock on south (right)
N38 42.687 W110 07.714
1.5   R out to viewpoint and back
North (R) on return
1.8   R off dirt onto slickrock, head NE
N38 42.760 W110 07.567
3.6   Arrive at cliffs over Green River
Turn left and uphill (before knoll!)
N38 43.655 W110 06.844
3.9    R around slot canyon
4.2    Straight across dirt ridge
N38 43.739 W110 07.114
4.4    Ugly dirt section, follow skirts of bluff
N38 43.851 W110 07.006
4.6    Back at slickrock
5.0    Trail veers west (L) N38 44.180 W110 06.747
5.5    Watch for large rockpile
Find way up R side of wash
N38 44.512 W110 06.905
L on DT
6.7    L on road N38 44.113 W110 08.007
8.6    Back at car
Getting there: From US-6, get eastbound on I-70. Three miles from the on-ramp, exit at the first Green River off-ramp. Go left under the freeway and continue into Green River. At Airport Road, turn right (just look for the "Airport" signs). The road will veer left along the railroad tracks. Stay along the tracks until the Airport sign turns you right, across the tracks. Go under I-70 and drive the paved road about 2 miles. At the "San Rafael Desert / Horseshoe Bend" sign, turn left onto graded gravel road. Stay on the main road for 20 miles, then cross the new bridge over the San Rafael River. Note that spot! 1.7 miles later, you'll pass a DT on the left N38 44.113 W110 08.007. That's the return from the northern loop. Keep going. At 3.7 miles past the bridge, there's a marked (but unsigned) DT on the left heading up over a small rise N38 42.653 W110 08.776. That's the official starting spot! To get to the southern end of the slickrock, drive another 1.9 miles south until the road drops through a wash N38 41.061 W110 09.296.