The J-Boy Trail lies on the eastern end of the Red
Fleet mountain bike trail area. As of 2016 it's the newest addition to
the area. It's 2.5 miles long with around 400 vertical feet of elevation
change. J-Boy can be done as a short loop (see below) or as part of a
longer ride when combined with other area trails.
View to the north as J-Boy approaches
the Dinosaur Tracks road. Photos and trail review by Bruce
on June 23, 2016.
|The portion of J-Boy south of the Dinosaur Tracks road is
somewhat technical. Skilled intermediates can muddle through, but it's
intended for expert riders. I found J-Boy to be the most interesting and
fun ride of the Red Fleet area.
View south from the ride's highest
point. The water is Red Fleet Reservoir.
|| Many riders start with the first
portion of Handsome Cabin Boy, then after
riding J-Boy continue to Jazz Chromoly for
a longer continuous loop ride. (See the big loop ride description below.)
The Three Amigos loop ride is
reached via J-Boy's northeastern side. A detour onto this lariat loop
makes a satisfying longer ride.
Typical trail on the northern half of
the ride -- undulating dirt in a forest of juniper.
|As of 2016, the Red Fleet trails do not have dedicated
mountain bike trailheads. J-Boy crosses the paved road at the trailhead
for the Dinosaur Tracks hiking trail. There's a bathroom and map kiosk
here. This is an easy way to find the trail, but on weekends the parking
lot is often crowded -- and if so, a kind bike rider will save space for
hiking families by parking elsewhere.
The Dinosaur Track trailhead. I'm
standing at the entry to the J-Boy trail north of the road. The southbound trail
is to the left of the kiosk (combined with the hiking trail for the first
||The Dinosaur Tracks trailhead is the beginning point for the
short loop ride, described below. It's a quick but satisfying "while
you're in the area but don't have any time" ride. Heading clockwise,
this mini loop climbs the southern limb of J-Boy before descending to Handsome Cabin Boy
northbound, then descends east on J-Boy back to the trailhead. It's a fast
2 miles with 200 vertical of climbing.
Climbing south (counterclockwise) away
from the trailhead. Navajo or Nugget sandstone forms the
"pillows" on the skyline.
|A nice longer loop that hits the major Red Fleet trails
Cabin Boy with J-Boy, then finishes with a cruise around
the top of Jazz Chromoly. It's 7.8 miles
with around 2000 vertical feet of climbing. See the ride directions
further down the page. Because this loop passes the entry to the Three Amigos
lariat ride, you can easily add that trail for a satisfying longer ride. (Note:
In 2016 there are ominous warnings about blasting in the Three Amigos area, posted
by the trailmap sign near the Dinosaur Tracks trail crossing. The trail
may be subject to intermittent closure. Check current status before riding
and obey any closure signs!)
View of the same area as above, but
heading north (counterclockwise).
Short Loop Ride from
Dinosaur Tracks TH (2 miles)
||From the parking strip, find the trail heading south between
the bathroom and the kiosk. After 100 feet, fork right on J-Boy. (The
Dinosaur Tracks trail beyond this point is hiking-only!)
After a bit of up-and-down you'll begin a serious climb along the edge
of the tilted sandstone. (The layers are tilted here due to the uplift
that raised the Uintah Mountains.) You'll gain about 150 vertical feet
over the 1/2 mile up to the viewpoint.
Little Rocky pauses to enjoy the view
about 100 vertical feet into the climb on the Short Loop.
|Enjoy the views as you reach a viewpoint at 6000 feet
elevation. You can see the peaks of the eastern Uintahs to the northwest.
To the south you can see Red Fleet Reservoir and the rolling Nugget
(Navajo) sandstone behind it.
And this is the trail -- straight up
this strip of sandstone along the cliff edge.
||After a quick cruise on top, you'll begin a somewhat
technical drop down to the Handsome Cabin Boy (HCB) trail. Good stuff, but
over too quickly. The tech stuff is now behind you.
Fork to the right on HCB. Cross the road. At the next trail fork, turn
right on J-Boy eastbound.
The trail continues southeast from the
viewpoint on the clockwise short loop.
|J-Boy will undulate along the skirts of the mountain. When
you hit open rock in a wash, you're almost done. J-Boy will pop to the
right out of the wash to the road at the trailhead.
Dropping through some rough rock, with
Red Fleet straight ahead.
Big Loop Ride -- HCB to JB to JCM (8 miles)
||This 7.8 mile loop starts on Handsome
Cabin Boy, detours onto J-Boy, then continues to the top side of the Jazz
Chromoly loop. You'll do the technical part of J-Boy in the opposite
direction (south to north) from the mini-loop above.
Interesting spot on the trail, looking
south. The path takes you between the cliff and the unusual stone pillar
near the tree. Exactly a handlebar's width plus an inch.
|At the Jazz Chromoly / HCB
trailhead, go to the road and find Handsome Cabin Boy a bit to the east.
Follow HCB clockwise 1.1 miles, then detour onto J-Boy. You'll make a
fairly stiff and technical climb along the edge of the cliffs to reach the
viewpoint at the top.
The trail takes a couple of
switchbacks as it works along the cliffs between HCB and the summit.
||In this direction, the descent on J-Boy is fairly straight
and uncomplicated. When you reach the road, find the continuing trail
across the road opposite the uphill corner of the parking strip.
Take J-Boy uphill and veer right as it rejoins HCB. At the next trail
fork, keep right on J-Boy as HCB goes left.
View from the junction of HCB and
J-Boy north of the road.
|Pass the Three Amigos trail,
keeping left. (Check the status of Three Amigos
before detouring onto that trail. There's intermittent blasting in the
area, subjecting the trail to closure!)
Go left again as the trail splits in a sagebrush sea near the road.
Climb up and across the road as you rejoin HCB. (Alternate: just coast
down the pavement to the cattle grate.) HCB will come back to the road at
a cattle grate. Left of the grate is a connector to Jazz
Chromoly. Keep right to head uphill on JCM.
The northern portion of J-Boy is
mostly undulating dirt ribbon. We're facing east, descending back to the
Dinosaur Tracks trailhead.
||On Jazz Chromoly, keep right at all the trail forks for the
outer (northern) side of the trail system. It will drop to a wash
southbound along Highway 191, then climb east uphill to the trailhead.
Very nice trail for skilled riders. Beautiful views, varied terrain.
Worthwhile ride, whether you make it a destination or just happen to be in
A bit of slickrock north of the road
near the trailhead.
|Riding notes, little J-Boy loop:
Dinosaur Tracks trailhead
0.0 Dino tracks trail N40 35.740 W109 26.178
100 feet, fork R on J-Boy
N40 35.720 W109 26.188
0.6 View, highest point
1.2 Hard R on HCB
N40 35.848 W109 26.657
|1.4 Cross road to slickrock
N40 35.925 W109 26.403
1.7 R downhill on J-Boy
N40 36.032 W109 26.225
2.0 Cross road to parking
|Riding notes, HCB/JB/JCM loop:
Jazz Chromoly trailhead
0.0 Exit parking, L on paved road
N40 35.923 W109 27.470
100 feet later, R on narrow ST
N40 35.926 W109 27.430
0.6 Keep straight R (L=bailout to road)
N40 35.720 W109 26.896
0.7 Fork, L through wash and up rock
N40 35.619 W109 26.858
1.0 Climbing eases
(you've done 200 vertical in 0.4 mi)
1.1 Fork R to J-Boy)
N40 35.847 W109 26.653
1.7 Viewpoint, begin descent
2.2 L uphill on road 100 feet
R to trail N40 35.740 W109 26.178
2.6 Veer R (rejoin HCB)
N40 36.031 W109 26.219
3.1 Keep R on J-Boy (L = HCB)
N40 36.351 W109 26.127
|3.3 Keep L (R = Three Amigos)
N40 36.408 W109 26.268
3.5 Fork L N40 36.256 W109 26.412
3.6 R up to paved road
N40 36.181 W109 26.373
4.0 Cross road and cattlegrate
N on ST N40 36.142 W109 26.621
4.1 Join Jazz Chromoly, keep R
N40 36.238 W109 26.713
4.8 Turn L (west) N40 36.784 W109 26.862
5.7 Rightmost fork
N40 36.550 W109 27.397
6.3 Alternate rejoins on L
N40 36.094 W109 27.626
6.4 Fork hard R
N40 36.033 W109 27.728
7.0 Keep R N40 35.955 W109 27.894
7.8 Back at parking
Jazz Chromoly Trailhead:
In Vernal on US-40 (the main drag), turn north on US-191. Drive to mile
10.7 and turn right at the paved road signed "Red Fleet Dinosaur
Trackway." Drive uphill 0.6 miles. At the top of the hill, turn left
onto a dirt road and immediately park in the wide area on the left. On
your bike, go back to the paved road and turn left. 100 feet later, find
the narrow Handsome Cabin Boy (HCB) singletrack on the right (south) side of the road, heading south.
J-Boy is found 1.1 miles along HCB.
Cattle grate parking: Drive to the cattle grate at mile 1.5 and park in the
small spot on the right side of the road. Find Handsome Cabin Boy southbound along the
fence and follow it until it crosses the road again. J-Boy forks left
immediately as the trail leaves the road.
|Three Amigos dirt road: About 1/10 mile uphill
from the cattle grate (around mile 1.6 from US 191), turn left to a dirt
road. Find a parking spot along the edge of the road. Backtrack to the
paved road, turn left uphill, and go 100 feet to find J-Boy on the left
(uphill) side of the road.
Dinosaur Tracks trailhead: Drive to the Dinosaur Tracks parking area at mile
2.4 from US 191. J-Boy is across the road from the uphill end of the
parking strip, and also 100 feet down the dinosaur tracks hiking trail.